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• Solve equations and inequalities
• Simplify expressions
• Factor polynomials
• Graph equations and inequalities
• Advanced solvers
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• Arithmetics
• Determinant
• Percentages
• Scientific Notation
• Inequalities

What can QuickMath do?

QuickMath will automatically answer the most common problems in algebra, equations and calculus faced by high-school and college students.

• The algebra section allows you to expand, factor or simplify virtually any expression you choose. It also has commands for splitting fractions into partial fractions, combining several fractions into one and cancelling common factors within a fraction.
• The equations section lets you solve an equation or system of equations. You can usually find the exact answer or, if necessary, a numerical answer to almost any accuracy you require.
• The inequalities section lets you solve an inequality or a system of inequalities for a single variable. You can also plot inequalities in two variables.
• The calculus section will carry out differentiation as well as definite and indefinite integration.
• The matrices section contains commands for the arithmetic manipulation of matrices.
• The graphs section contains commands for plotting equations and inequalities.
• The numbers section has a percentages command for explaining the most common types of percentage problems and a section for dealing with scientific notation.

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• Add Fractions
• Simplify Fractions

Algebra Practice

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Algebra Worksheets

Free worksheets with answer keys.

Enjoy these free printable sheets . Each one has model problems worked out step by step, practice problems, as well as challenge questions at the sheets end. Plus each one comes with an answer key.

• Distance Formula
• Equation of Circle
• Factor Trinomials Worksheet
• Domain and Range
• Mixed Problems on Writing Equations of Lines
• Slope Intercept Form Worksheet
• Standard Form Worksheet
• Point Slope Worksheet
• Write Equation of Line from the Slope and 1 Point
• Write Equation of Line from Two Points
• Equation of Line Parallel to Another Line and Through a Point
• Equation of Line Perpendicular to Another Line and Through a Point
• Slope of a Line
• Perpendicular Bisector of Segment
• Write Equation of Line Mixed Review
• Word Problems
• Multiplying Monomials Worksheet
• Multiplying and Dividing Monomials Sheet
• Adding and Subtracting Polynomials Worksheet
• Multiplying Monomials with Polynomials Worksheet
• Multiplying Binomials Worksheet
• Multiplying Polynomials
• Simplifying Polynomials
• Factoring Trinomials
• Operations with Polynomials Worksheet
• Dividing Radicals
• Simplify Radicals Worksheet
• Adding Radicals
• Mulitplying Radicals Worksheet
• Radicals Review (Mixed review worksheet on radicals and square roots)
• Solve Systems of Equations Graphically
• Solve Systems of Equations by Elimination
• Solve by Substitution
• Solve Systems of Equations (Mixed review)
• Activity on Systems of Equations (Create an advertisement for your favorite method to Solve Systems of Equations )
• Real World Connections (Compare cell phone plans)
• Scientific Notation
• Operations with Scientific Notation

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• Adding Using Long Addition
• Long Subtraction
• Long Multiplication
• Long Division
• Dividing Using Partial Quotients Division
• Converting Regular to Scientific Notation
• Arranging a List in Order
• Expanded Notation
• Prime or Composite
• Comparing Expressions
• Converting to a Percentage
• Finding the Additive Inverse
• Finding the Multiplicative Inverse
• Reducing Fractions
• Finding the Reciprocal
• Converting to a Decimal
• Converting to a Mixed Number
• Adding Fractions
• Subtracting Fractions
• Multiplying Fractions
• Dividing Fractions
• Converting Ratios to Fractions
• Converting Percents to Decimal
• Converting Percents to Fractions
• Converting the Percent Grade to Degree
• Converting the Degree to Percent Grade
• Finding the Area of a Rectangle
• Finding the Perimeter of a Rectangle
• Finding the Area of a Square
• Finding the Perimeter of a Square
• Finding the Area of a Circle
• Finding the Circumference of a Circle
• Finding the Area of a Triangle
• Finding the Area of a Trapezoid
• Finding the Volume of a Box
• Finding the Volume of a Cylinder
• Finding the Volume of a Cone
• Finding the Volume of a Pyramid
• Finding the Volume of a Sphere
• Finding the Surface Area of a Box
• Finding the Surface Area of a Cylinder
• Finding the Surface Area of a Cone
• Finding the Surface Area of a Pyramid
• Converting to a Fraction
• Simple Exponents
• Prime Factorizations
• Finding the Factors
• Simplifying Fractions
• Converting Grams to Kilograms
• Converting Grams to Pounds
• Converting Grams to Ounces
• Converting Feet to Inches
• Converting to Meters
• Converting Feet to Miles
• Converting Feet to Yards
• Converting to Feet
• Converting to Yards
• Converting Miles to Feet
• Converting Miles to Kilometers
• Converting Miles to Yards
• Converting Kilometers to Miles
• Converting Kilometers to Meters
• Converting Meters to Feet
• Converting Meters to Inches
• Converting Ounces to Grams
• Converting Ounces to Pounds
• Converting Ounces to Tons
• Converting Pounds to Grams
• Converting Pounds to Ounces
• Converting Pounds to Tons
• Converting Yards to Feet
• Converting Yards to Millimeters
• Converting Yards to Inches
• Converting Yards to Miles
• Converting Yards to Meters
• Converting Fahrenheit to Celsius
• Converting Celsius to Fahrenheit
• Finding the Median
• Finding the Mean (Arithmetic)
• Finding the Mode
• Finding the Minimum
• Finding the Maximum
• Finding the Lower or First Quartile
• Finding the Upper or Third Quartile
• Finding the Five Number Summary
• Finding a Point's Quadrant
• Finding the Midpoint of a Line Segment
• Distance Formula
• Arithmetic Operations
• Combining Like Terms
• Determining if the Expression is a Polynomial
• Distributive Property
• Simplifying
• Multiplication
• Polynomial Addition
• Polynomial Subtraction
• Polynomial Multiplication
• Polynomial Division
• Simplifying Expressions
• Evaluate the Expression Using the Given Values
• Multiplying Polynomials Using FOIL
• Identifying Degree
• Operations on Polynomials
• Negative Exponents
• Evaluating Radicals
• Solving by Adding/Subtracting
• Solving by Multiplying/Dividing
• Solving Containing Decimals
• Solving for a Variable
• Solving Linear Equations
• Solving Linear Inequalities
• Finding the Quadratic Constant of Variation
• Converting the Percent Grade to Slope
• Converting the Slope to Percent Grade
• Finding Equations Using Slope-Intercept
• Finding the Slope
• Finding the y Intercept
• Calculating Slope and y-Intercept
• Rewriting in Slope-Intercept Form
• Finding Equations Using the Slope-Intercept Formula
• Finding Equations Using Two Points
• Finding a Perpendicular Line Containing a Given Point
• Finding a Parallel Line Containing a Given Point
• Finding a Parallel Line to the Given Line
• Finding a Perpendicular Line to the Given Line
• Finding Ordered Pair Solutions
• Using a Table of Values to Graph an Equation
• Finding the Equation Using Point-Slope Form
• Finding the Surface Area of a Sphere
• Solving by Graphing
• Finding the LCM of a List of Expressions
• Finding the LCD of a List of Expressions
• Determining if the Number is a Perfect Square
• Finding the Domain
• Evaluating the Difference Quotient
• Solving Using the Square Root Property
• Determining if True
• Finding the Holes in a Graph
• Finding the Common Factors
• Expand a Trinomial with the Trinomial Theorem
• Finding the Start Point Given the Mid and End Points
• Finding the End Point Given the Start and Mid Points
• Finding the Slope and y-Intercept
• Finding the Equation of the Parabola
• Finding the Average Rate of Change
• Finding the Slope of the Perpendicular Line to the Line Through the Two Points
• Rewriting Using Negative Exponents
• Synthetic Division
• Maximum Number of Real Roots/Zeros
• Finding All Possible Roots/Zeros (RRT)
• Finding All Roots with Rational Root Test (RRT)
• Finding the Remainder
• Finding the Remainder Using Long Polynomial Division
• Reordering the Polynomial in Ascending Order
• Reordering the Polynomial in Descending Order
• Finding the Leading Term
• Finding the Leading Coefficient
• Finding the Degree, Leading Term, and Leading Coefficient
• Finding the GCF of a Polynomial
• Factoring Out Greatest Common Factor (GCF)
• Identifying the Common Factors
• Cancelling the Common Factors
• Finding the LCM using GCF
• Finding the GCF
• Factoring Trinomials
• Trinomial Squares
• Factoring Using Any Method
• Factoring a Difference of Squares
• Factoring a Sum of Cubes
• Factoring by Grouping
• Factoring a Difference of Cubes
• Determine if an Expression is a Factor
• Determining if Factor Using Synthetic Division
• Find the Factors Using the Factor Theorem
• Determining if Polynomial is Prime
• Determining if the Polynomial is a Perfect Square
• Expand using the Binomial Theorem
• Factoring over the Complex Numbers
• Finding All Integers k Such That the Trinomial Can Be Factored
• Determining if Linear
• Rewriting in Standard Form
• Finding x and y Intercepts
• Finding Equations Using the Point Slope Formula
• Finding Equations Given Point and y-Intercept
• Finding the Constant Using Slope
• Finding the Slope of a Parallel Line
• Finding the Slope of a Perpendicular Line
• Simplifying Absolute Value Expressions
• Solving with Absolute Values
• Finding the Vertex for the Absolute Value
• Rewriting the Absolute Value as Piecewise
• Calculating the Square Root
• Simplifying Radical Expressions
• Rationalizing Radical Expressions
• Solving Radical Equations
• Rewriting with Rational (Fractional) Exponents
• Finding the Square Root End Point
• Operations on Rational Expressions
• Determining if the Point is a Solution
• Solving over the Interval
• Finding the Range
• Finding the Domain and Range
• Solving Rational Equations
• Adding Rational Expressions
• Subtracting Rational Expressions
• Multiplying Rational Expressions
• Finding the Equation Given the Roots
• Finding the Asymptotes
• Finding the Constant of Variation
• Finding the Equation of Variation
• Substitution Method
• Addition/Elimination Method
• Graphing Method
• Determining Parallel Lines
• Determining Perpendicular Lines
• Dependent, Independent, and Inconsistent Systems
• Finding the Intersection (and)
• Using the Simplex Method for Constraint Maximization
• Using the Simplex Method for Constraint Minimization
• Finding the Union (or)
• Finding the Equation with Real Coefficients
• Solving in Terms of the Arbitrary Variable
• Finding a Direct Variation Equation
• Finding the Slope for Every Equation
• Finding a Variable Using the Constant of Variation
• Quadratic Formula
• Solving by Factoring
• Solve by Completing the Square
• Finding the Perfect Square Trinomial
• Finding the Quadratic Equation Given the Solution Set
• Finding a,b, and c in the Standard Form
• Finding the Discriminant
• Finding the Zeros by Completing the Square
• Quadratic Inequalities
• Rational Inequalities
• Converting from Interval to Inequality
• Converting to Interval Notation
• Rewriting as a Single Interval
• Determining if the Relation is a Function
• Finding the Domain and Range of the Relation
• Finding the Inverse of the Relation
• Finding the Inverse
• Determining if One Relation is the Inverse of Another
• Determining if Surjective (Onto)
• Determining if Bijective (One-to-One)
• Determining if Injective (One to One)
• Rewriting as an Equation
• Rewriting as y=mx+b
• Solving Function Systems
• Find the Behavior (Leading Coefficient Test)
• Determining Odd and Even Functions
• Describing the Transformation
• Finding the Symmetry
• Arithmetic of Functions
• Domain of Composite Functions
• Finding Roots Using the Factor Theorem
• Determine if Injective (One to One)
• Determine if Surjective (Onto)
• Finding the Vertex
• Finding the Sum
• Finding the Difference
• Finding the Product
• Finding the Quotient
• Finding the Domain of the Sum of the Functions
• Finding the Domain of the Difference of the Functions
• Finding the Domain of the Product of the Functions
• Finding the Domain of the Quotient of the Functions
• Finding Roots (Zeros)
• Identifying Zeros and Their Multiplicities
• Finding the Bounds of the Zeros
• Proving a Root is on the Interval
• Finding Maximum Number of Real Roots
• Function Composition
• Rewriting as a Function
• Determining if a Function is Rational
• Determining if a Function is Proper or Improper
• Maximum/Minimum of Quadratic Functions
• Finding All Complex Number Solutions
• Rationalizing with Complex Conjugates
• Vector Arithmetic
• Finding the Complex Conjugate
• Finding the Magnitude of a Complex Number
• Simplifying Logarithmic Expressions
• Expanding Logarithmic Expressions
• Evaluating Logarithms
• Rewriting in Exponential Form
• Converting to Logarithmic Form
• Exponential Expressions
• Exponential Equations
• Converting to Radical Form
• Find the Nth Root of the Given Value
• Simplifying Matrices
• Finding the Variables
• Solving the System of Equations Using an Inverse Matrix
• Finding the Dimensions
• Multiplication by a Scalar
• Subtraction
• Finding the Determinant of the Resulting Matrix
• Finding the Inverse of the Resulting Matrix
• Finding the Identity Matrix
• Finding the Scalar multiplied by the Identity Matrix
• Simplifying the Matrix Operation
• Finding the Determinant of a 2x2 Matrix
• Finding the Determinant of a 3x3 Matrix
• Finding the Determinant of Large Matrices
• Inverse of a 2x2 Matrix
• Inverse of an nxn Matrix
• Finding Reduced Row Echelon Form
• Finding the Transpose
• Finding the Adjoint
• Finding the Cofactor Matrix
• Finding the Pivot Positions and Pivot Columns
• Finding the Basis and Dimension for the Row Space of the Matrix
• Finding the Basis and Dimension for the Column Space of the Matrix
• Finding the LU Decomposition of a Matrix
• Identifying Conic Sections
• Identifying Circles
• Finding a Circle Using the Center and Another Point
• Finding a Circle by the Diameter End Points
• Finding the Parabola Equation Using the Vertex and Another Point
• Finding the Properties of the Parabola
• Finding the Vertex Form of the Parabola
• Finding the Vertex Form of an Ellipse
• Finding the Vertex Form of a Circle
• Finding the Vertex Form of a Hyperbola
• Finding the Standard Form of a Parabola
• Finding the Expanded Form of an Ellipse
• Finding the Expanded Form of a Circle
• Finding the Expanded Form of a Hyperbola
• Vector Addition
• Vector Subtraction
• Vector Multiplication by a Scalar
• Finding the Length
• Finding the Position Vector
• Determining Column Spaces
• Finding an Orthonormal Basis by Gram-Schmidt Method
• Rewrite the System as a Vector Equality
• Finding the Rank
• Finding the Nullity
• Finding the Distance
• Finding the Plane Parallel to a Line Given four 3d Points
• Finding the Intersection of the Line Perpendicular to Plane 1 Through the Origin and Plane 2
• Finding the Eigenvalues
• Finding the Characteristic Equation
• Finding the Eigenvectors/Eigenspace of a Matrix
• Proving a Transformation is Linear
• Finding the Kernel of a Transformation
• Projecting Using a Transformation
• Finding the Pre-Image
• Finding the Intersection of Sets
• Finding the Union of Number Sets
• Determining if a Set is a Subset of Another Set
• Determining if Two Sets are Mutually Exclusive
• Finding the Set Complement of Two Sets
• Finding the Power Set
• Finding the Cardinality
• Finding the Cartesian Product of Two Sets
• Determining if a Set is a Proper Subset of Another Set
• Finding the Function Rule
• Finding the Square or Rectangle Area Given Four Points
• Finding the Square or Rectangle Perimeter Given Four Points
• Finding the Square or Rectangle Area Given Three Points
• Finding the Square or Rectangle Perimeter Given Three Points
• Finding the Equation of a Circle
• Finding the Equation of a Hyperbola
• Finding the Equation of an Ellipse
• Partial Fraction Decomposition
• Finding an Angle Using another Angle
• Pythagorean Theorem
• Finding the Sine
• Finding the Cosine
• Finding the Tangent
• Finding the Trig Value
• Converting to Degrees, Minutes, and Seconds
• Finding Trig Functions Using Identities
• Finding Trig Functions Using the Right Triangle
• Converting Radians to Degrees
• Converting Degrees to Radians
• Finding a Reference Angle
• Finding a Supplement
• Finding a Complement
• Converting RPM to Radians per Second
• Finding the Quadrant of the Angle
• Graphing Sine & Cosine Functions
• Graphing Other Trigonometric Functions
• Amplitude, Period, and Phase Shift
• Finding the Other Trig Values in a Quadrant
• Finding the Exact Value
• Finding the Value Using the Unit Circle
• Expanding Trigonometric Expressions
• Expanding Using Double-Angle Formulas
• Expanding Using Triple-Angle Formulas
• Expanding Using Sum/Difference Formulas
• Simplify Using Pythagorean Identities
• Simplify by Converting to Sine/Cosine
• Inverting Trigonometric Expressions
• Finding the Trig Value of an Angle
• Expanding Using De Moivre's Theorem
• Verifying Trigonometric Identities
• Using Fundamental Identities
• Solving Standard Angle Equations
• Complex Trigonometric Equations
• Solving the Triangle
• Find the Roots of a Complex Number
• Complex Operations
• Trigonometric Form of a Complex Number
• Converting to Polar Coordinates
• Identifying and Graphing Circles
• Identifying and Graphing Limacons
• Identifying and Graphing Roses
• Identifying and Graphing Cardioids
• Difference Quotient
• Finding Upper and Lower Bounds
• Evaluating Functions
• Right Triangle Trigonometry
• Arithmetic Sequences/Progressions
• Geometric Sequences/Progressions
• Finding the Next Term of the Sequence
• Finding the nth Term Given a List of Numbers
• Finding the nth Term
• Finding the Sum of First n Terms
• Expanding Series Notation
• Finding the Sum of the Series
• Finding the Sum of the Infinite Geometric Series
• Converting to Rectangular Coordinates
• Evaluating Limits Approaching a Value
• Evaluating Limits Approaching Infinity
• Finding the Angle Between the Vectors
• Determining if the Point is on the Graph
• Finding the Antiderivative
• Checking if Continuous Over an Interval
• Determining if a Series is Divergent
• Using the Integral Test for Convergence
• Determining if an Infinite Series is Convergent Using Cauchy's Root Test
• Using the Limit Definition to Find the Tangent Line at a Given Point
• Finding the nth Derivative
• Finding the Derivative Using Product Rule
• Finding the Derivative Using Quotient Rule
• Finding the Derivative Using Chain Rule
• Use Logarithmic Differentiation to Find the Derivative
• Finding the Derivative
• Implicit Differentiation
• Using the Limit Definition to Find the Derivative
• Evaluating the Derivative
• Finding Where dy/dx is Equal to Zero
• Finding the Linearization
• Finding a Tangent Line to a Curve
• Checking if Differentiable Over an Interval
• The Mean Value Theorem
• Finding the Inflection Points
• Find Where the Function Increases/Decreases
• Finding the Critical Points of a Function
• Find Horizontal Tangent Line
• Evaluating Limits with L'Hospital Rule
• Local Maxima and Minima
• Finding the Absolute Maximum and Minimum on the Given Interval
• Finding Concavity using the Second Derivative
• Finding the Derivative using the Fundamental Theorem of Calculus
• Find the Turning Points
• Finding the Integral
• Evaluating Definite Integrals
• Evaluating Indefinite Integrals
• Substitution Rule
• Finding the Arc Length
• Finding the Average Value of the Derivative
• Finding the Average Value of the Equation
• Finding Area Between Curves
• Finding the Volume
• Finding the Average Value of the Function
• Finding the Root Mean Square
• Integration by Parts
• Trigonometric Integrals
• Trigonometric Substitution
• Integration by Partial Fractions
• Eliminating the Parameter from the Function
• Verify the Solution of a Differential Equation
• Solve for a Constant Given an Initial Condition
• Find an Exact Solution to the Differential Equation
• Verify the Existence and Uniqueness of Solutions for the Differential Equation
• Solve for a Constant in a Given Solution
• Solve the Bernoulli Differential Equation
• Solve the Linear Differential Equation
• Solve the Homogeneous Differential Equation
• Solve the Exact Differential Equation
• Approximate a Differential Equation Using Euler's Method
• Finding Elasticity of Demand
• Finding the Consumer Surplus
• Finding the Producer Surplus
• Finding the Gini Index
• Finding the Geometric Mean
• Finding the Quadratic Mean (RMS)
• Find the Mean Absolute Deviation
• Finding the Mid-Range (Mid-Extreme)
• Finding the Interquartile Range (H-Spread)
• Finding the Midhinge
• Finding the Standard Deviation
• Finding the Skew of a Data Set
• Finding the Range of a Data Set
• Finding the Variance of a Data Set
• Finding the Class Width
• Solving Combinations
• Solving Permutations
• Finding the Probability of Both Independent Events
• Finding the Probability of Both Dependent Events
• Finding the Probability for Both Mutually Exclusive Events
• Finding the Conditional Probability for Independent Events
• Determining if Given Events are Independent/Dependent Events
• Determining if Given Events are Mutually Exclusive Events
• Finding the Probability of Both not Mutually Exclusive Events
• Finding the Conditional Probability Using Bayes' Theorem
• Finding the Probability of the Complement
• Describing Distribution's Two Properties
• Finding the Expectation
• Finding the Variance
• Finding the Probability of a Binomial Distribution
• Finding the Probability of the Binomial Event
• Finding the Mean
• Finding the Relative Frequency
• Finding the Percentage Frequency
• Finding the Upper and Lower Class Limits of the Frequency Table
• Finding the Class Boundaries of the Frequency Table
• Finding the Class Width of the Frequency Table
• Finding the Midpoints of the Frequency Table
• Finding the Mean of the Frequency Table
• Finding the Variance of the Frequency Table
• Finding the Standard Deviation of the Frequency Table
• Finding the Cumulative Frequency of the Frequency Table
• Finding the Relative Frequency of the Frequency Table
• Finding the Median Class Interval of the Frequency Table
• Finding the Modal Class of the Frequency Table
• Creating a Grouped Frequency Distribution Table
• Finding the Data Range
• Finding a z-Score for a Normal Distribution
• Approximating Using Normal Distribution
• Finding the Probability of the z-Score Range
• Finding the Probability of a Range in a Nonstandard Normal Distribution
• Finding the z-Score Using the Table
• Finding the z-Score
• Testing the Claim
• Finding a t-Value for a Confidence Level
• Finding the Critical t-Value
• Setting the Alternative Hypothesis
• Setting the Null Hypothesis
• Determining if Left, Right, or Two Tailed Test Given the Null Hypothesis
• Determining if Left, Right, or Two Tailed Test Given the Alternative Hypothesis
• Finding Standard Error
• Finding the Linear Correlation Coefficient
• Determining if the Correlation is Significant
• Finding a Regression Line
• Cramer's Rule
• Solving using Matrices by Elimination
• Solving using Matrices by Row Operations
• Solving using an Augmented Matrix
• Finding the Simple Interest Received
• Finding the Present Value with Compound Interest
• Finding the Simple Interest Future Value
• Finding the Future Value with Continuous Interest
• Finding the Norm in Real Vector Space
• Finding the Direction Angle of the Vector
• Finding the Cross Product of Vectors
• Finding the Dot Product of Vectors
• Determining if Vectors are Orthogonal
• Finding the Distance Between the Vectors
• Finding a Unit Vector in the Same Direction as the Given Vector
• Finding the Angle Between Two Vectors Using the Cross Product
• Finding the Angle Between Two Vectors Using the Dot Product
• Finding the Projection of One Vector Onto another Vector
• Matrices Addition
• Matrices Subtraction
• Matrices Multiplication
• Finding the Trace
• Finding the Basis
• Matrix Dimension
• Convert to a Linear System
• Diagonalizing a Matrix
• Determining the value of k for which the system has no solutions
• Linear Independence of Real Vector Spaces
• Finding the Null Space
• Determining if the Vector is in the Span of the Set
• Finding the Number of Protons
• Finding the Number of Electrons
• Finding the Number of Neutrons
• Finding the Mass of a Single Atom
• Finding the Electron Configuration
• Finding the Atomic Mass
• Finding the Atomic Number
• Finding the Mass Percentages
• Finding Oxidation Numbers
• Balancing Chemical Equations
• Balancing Burning Reactions
• Finding the Density at STP
• Determining if the Compound is Soluble in Water
• Finding Mass
• Finding Density
• Finding Weight
• Finding Force
• Finding the Work Done
• Finding Angular Velocity
• Finding Centripetal Acceleration
• Finding Final Velocity
• Finding Average Acceleration
• Finding Displacement
• Finding Voltage Using the Ohm's Law
• Finding Electrical Power
• Finding Kinetic Energy
• Finding Power
• Finding Wavelength
• Finding Frequency
• Finding Pressure of the Gas

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Free Algebra Questions and Problems with Answers

Free intermediate and college algebra questions and problems are presented along with answers and explanations. Free worksheets to download are also included.

Intermediate Algebra Questions with Answers

• sample 1 .(student generated solutions). Also included are the solutions with full explanations .
• sample 2 .(True / False type). Also included are the solutions with full explanations .
• sample 3 .(student generated solutions). solutions with full explanations are included.
• sample 4 .(True / False type). solutions with full explanations included.
• sample 5 .(Multiple choice questions type). Also included are the solutions with full explanations .
• sample 6 .(True / False type). solutions with full explanations included.

Intermediate Algebra Problems with Detailed Solutions

• Algebra Problems .
• Intermediate Algebra Problems With Answers - sample 1 : equations, system of equations, percent problems, relations and functions.
• Intermediate Algebra Problems With Answers - sample 2 :Find equation of line, domain and range from graph, midpoint and distance of line segments, slopes of perpendicular and parallel lines.
• Intermediate Algebra Problems With Answers - sample 3 : equations and system of equations, quadratic equations, function given by a table, intersections of lines, problems.
• Intermediate Algebra Problems With Answers - sample 4 . Functions, domain, range, zeros.
• Intermediate Algebra Problems With Answers - sample 5 . Scientific Notation
• Intermediate Algebra Problems With Answers - sample 6 . Equations of Lines
• Intermediate Algebra Problems With Answers - sample 7 . Slopes of Lines
• Intermediate Algebra Problems With Answers - sample 8 . Absolute Value Expressions
• Intermediate Algebra Problems With Answers - sample 9 . Solve Absolute Value Equations
• Intermediate Algebra Problems With Answers - sample 10 . Solve Absolute Value Inequalities
• Intermediate Algebra Problems With Answers - sample 11 . Simplify Algebraic Expressions by Removing Brackets
• Intermediate Algebra Problems With Answers - sample 12 . Simplify Algebraic Expressions with Exponents

Intermediate Algebra Worksheets

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• Worksheet (2) .
• Worksheet (3) .
• Worksheet (4) .
• Worksheet (5) .
• Worksheet (6) .

College Algebra Questions with Answers

• sample 1 .(multiple choice questions). Also Detailed solutions with full explanations are included
• sample 2 . (multiple choice questions)

College Algebra Problems with Answers

• sample 1: Quadratic Functions .
• sample 2: Composite and Inverse Functions .
• sample 3: Exponential and Logarithmic Functions .
• sample 4: Graphs of Functions .
• sample 5: Find Domain and Range of Functions .
• sample 6: Problems on Polynomials : Graphs, Factoring, Finding, Multiplying, Dividing, Factor theorem, Zeros
• sample 7: Equation of Circle : Finding equations, center, radius of circles
• sample 8: Equation of Ellipse : Finding equations, foci, center, vertices of ellipses
• sample 9: Equation of Parabola : Finding equations, focus, vertex, axis, directrix of parabola.
• sample 10: Equation of Hyperbola : Finding equations, foci, center and vertices of hyperbola.

College Algebra Worksheets

• Worksheet (1): Graphs of Basic Functions .
• Worksheet (2): Exponential Growth and Decay Problems .
• Worksheet (3): Graphing Exponential Functions .
• Worksheet (4): Graphing Logarithmic Functions .
• Worksheet (5): Solve Exponential Equations .
• Worksheet (6): Solve Logarithmic Equations .
• Worksheet (7): Multiple Choice Questions on Polynomials and Solutions
• Worksheet (8): Multiple Choice Questions on Rational Functions and Solutions .
• Worksheet (9): Graphing Inverse Functions .

Solving Equations Practice Questions

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Solving Word Questions

With LOTS of examples!

In Algebra we often have word questions like:

Example: Sam and Alex play tennis.

On the weekend Sam played 4 more games than Alex did, and together they played 12 games.

How many games did Alex play?

How do we solve them?

The trick is to break the solution into two parts:

Turn the English into Algebra.

Then use Algebra to solve.

Turning English into Algebra

To turn the English into Algebra it helps to:

• Read the whole thing first
• Do a sketch if possible
• Assign letters for the values
• Find or work out formulas

You should also write down what is actually being asked for , so you know where you are going and when you have arrived!

Also look for key words:

Thinking Clearly

Some wording can be tricky, making it hard to think "the right way around", such as:

Example: Sam has 2 dollars less than Alex. How do we write this as an equation?

• Let S = dollars Sam has
• Let A = dollars Alex has

Now ... is that: S − 2 = A

or should it be: S = A − 2

or should it be: S = 2 − A

The correct answer is S = A − 2

( S − 2 = A is a common mistake, as the question is written "Sam ... 2 less ... Alex")

Example: on our street there are twice as many dogs as cats. How do we write this as an equation?

• Let D = number of dogs
• Let C = number of cats

Now ... is that: 2D = C

or should it be: D = 2C

Think carefully now!

The correct answer is D = 2C

( 2D = C is a common mistake, as the question is written "twice ... dogs ... cats")

Let's start with a really simple example so we see how it's done:

Example: A rectangular garden is 12m by 5m, what is its area ?

Turn the English into Algebra:

• Use w for width of rectangle: w = 12m
• Use h for height of rectangle: h = 5m

Formula for Area of a Rectangle : A = w × h

We are being asked for the Area.

A = w × h = 12 × 5 = 60 m 2

The area is 60 square meters .

Now let's try the example from the top of the page:

Example: Sam and Alex play Tennis. On the weekend Sam played 4 more games than Alex did, and together they played 12 games. How many games did Alex play?

• Use S for how many games Sam played
• Use A for how many games Alex played

We know that Sam played 4 more games than Alex, so: S = A + 4

And we know that together they played 12 games: S + A = 12

We are being asked for how many games Alex played: A

Which means that Alex played 4 games of tennis.

Check: Sam played 4 more games than Alex, so Sam played 8 games. Together they played 8 + 4 = 12 games. Yes!

A slightly harder example:

Example: Alex and Sam also build tables. Together they make 10 tables in 12 days. Alex working alone can make 10 in 30 days. How long would it take Sam working alone to make 10 tables?

• Use a for Alex's work rate
• Use s for Sam's work rate

12 days of Alex and Sam is 10 tables, so: 12a + 12s = 10

30 days of Alex alone is also 10 tables: 30a = 10

We are being asked how long it would take Sam to make 10 tables.

30a = 10 , so Alex's rate (tables per day) is: a = 10/30 = 1/3

Which means that Sam's rate is half a table a day (faster than Alex!)

So 10 tables would take Sam just 20 days.

Should Sam be paid more I wonder?

And another "substitution" example:

Example: Jenna is training hard to qualify for the National Games. She has a regular weekly routine, training for five hours a day on some days and 3 hours a day on the other days. She trains altogether 27 hours in a seven day week. On how many days does she train for five hours?

• The number of "5 hour" days: d
• The number of "3 hour" days: e

We know there are seven days in the week, so: d + e = 7

And she trains 27 hours in a week, with d 5 hour days and e 3 hour days: 5d + 3e = 27

We are being asked for how many days she trains for 5 hours: d

The number of "5 hour" days is 3

Check : She trains for 5 hours on 3 days a week, so she must train for 3 hours a day on the other 4 days of the week.

3 × 5 hours = 15 hours, plus 4 × 3 hours = 12 hours gives a total of 27 hours

Some examples from Geometry:

Example: A circle has an area of 12 mm 2 , what is its radius?

• Use A for Area: A = 12 mm 2
• Use r for radius

And the formula for Area is: A = π r 2

We are being asked for the radius.

We need to rearrange the formula to find the area

Example: A cube has a volume of 125 mm 3 , what is its surface area?

Make a quick sketch:

• Use V for Volume
• Use A for Area
• Use s for side length of cube
• Volume of a cube: V = s 3
• Surface area of a cube: A = 6s 2

We are being asked for the surface area.

First work out s using the volume formula:

Now we can calculate surface area:

An example about Money:

Example: Joel works at the local pizza parlor. When he works overtime he earns 1¼ times the normal rate. One week Joel worked for 40 hours at the normal rate of pay and also worked 12 hours overtime. If Joel earned $660 altogether in that week, what is his normal rate of pay?

• Joel's normal rate of pay: $N per hour
• Joel works for 40 hours at $N per hour = $40N
• When Joel does overtime he earns 1¼ times the normal rate = $1.25N per hour
• Joel works for 12 hours at $1.25N per hour = $(12 × 1¼N) = $15N
• And together he earned $660, so:

$40N + $(12 × 1¼N) = $660

We are being asked for Joel's normal rate of pay $N.

So Joel’s normal rate of pay is $12 per hour

Joel’s normal rate of pay is $12 per hour, so his overtime rate is 1¼ × $12 per hour = $15 per hour. So his normal pay of 40 × $12 = $480, plus his overtime pay of 12 × $15 = $180 gives us a total of $660

More about Money, with these two examples involving Compound Interest

Example: Alex puts $2000 in the bank at an annual compound interest of 11%. How much will it be worth in 3 years?

This is the compound interest formula:

So we will use these letters:

• Present Value PV = $2,000
• Interest Rate (as a decimal): r = 0.11
• Number of Periods: n = 3
• Future Value (the value we want): FV

We are being asked for the Future Value: FV

Example: Roger deposited $1,000 into a savings account. The money earned interest compounded annually at the same rate. After nine years Roger's deposit has grown to $1,551.33 What was the annual rate of interest for the savings account?

The compound interest formula:

• Present Value PV = $1,000
• Interest Rate (the value we want): r
• Number of Periods: n = 9
• Future Value: FV = $1,551.33

We are being asked for the Interest Rate: r

So the annual rate of interest is 5%

Check : $1,000 × (1.05) 9 = $1,000 × 1.55133 = $1,551.33

And an example of a Ratio question:

Example: At the start of the year the ratio of boys to girls in a class is 2 : 1 But now, half a year later, four boys have left the class and there are two new girls. The ratio of boys to girls is now 4 : 3 How many students are there altogether now?

• Number of boys now: b
• Number of girls now: g

The current ratio is 4 : 3

Which can be rearranged to 3b = 4g

At the start of the year there was (b + 4) boys and (g − 2) girls, and the ratio was 2 : 1

b + 4 g − 2 = 2 1

Which can be rearranged to b + 4 = 2(g − 2)

We are being asked for how many students there are altogether now: b + g

There are 12 girls !

And 3b = 4g , so b = 4g/3 = 4 × 12 / 3 = 16 , so there are 16 boys

So there are now 12 girls and 16 boys in the class, making 28 students altogether .

There are now 16 boys and 12 girls, so the ratio of boys to girls is 16 : 12 = 4 : 3 At the start of the year there were 20 boys and 10 girls, so the ratio was 20 : 10 = 2 : 1

And now for some Quadratic Equations :

Example: The product of two consecutive even integers is 168. What are the integers?

Consecutive means one after the other. And they are even , so they could be 2 and 4, or 4 and 6, etc.

We will call the smaller integer n , and so the larger integer must be n+2

And we are told the product (what we get after multiplying) is 168, so we know:

n(n + 2) = 168

We are being asked for the integers

That is a Quadratic Equation , and there are many ways to solve it. Using the Quadratic Equation Solver we get −14 and 12.

Check −14: −14(−14 + 2) = (−14)×(−12) = 168 YES

Check 12: 12(12 + 2) = 12×14 = 168 YES

So there are two solutions: −14 and −12 is one, 12 and 14 is the other.

Note: we could have also tried "guess and check":

• We could try, say, n=10: 10(12) = 120 NO (too small)
• Next we could try n=12: 12(14) = 168 YES

But unless we remember that multiplying two negatives make a positive we might overlook the other solution of (−14)×(−12).

Example: You are an Architect. Your client wants a room twice as long as it is wide. They also want a 3m wide veranda along the long side. Your client has 56 square meters of beautiful marble tiles to cover the whole area. What should the length of the room be?

Let's first make a sketch so we get things right!:

• the length of the room: L
• the width of the room: W
• the total Area including veranda: A
• the width of the room is half its length: W = ½L
• the total area is the (room width + 3) times the length: A = (W+3) × L = 56

We are being asked for the length of the room: L

This is a quadratic equation , there are many ways to solve it, this time let's use factoring :

And so L = 8 or −14

There are two solutions to the quadratic equation, but only one of them is possible since the length of the room cannot be negative!

So the length of the room is 8 m

L = 8, so W = ½L = 4

So the area of the rectangle = (W+3) × L = 7 × 8 = 56

There we are ...

... I hope these examples will help you get the idea of how to handle word questions. Now how about some practice?

Question Generator

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The resources on this page will hopefully help you teach AO2 and AO3 of the new GCSE specification - problem solving and reasoning.

This brief lesson is designed to lead students into thinking about how to solve mathematical problems. It features ideas of strategies to use, clear steps to follow and plenty of opportunities for discussion.

The PixiMaths problem solving booklets are aimed at "crossover" marks (questions that will be on both higher and foundation) so will be accessed by most students. The booklets are collated Edexcel exam questions; you may well recognise them from elsewhere. Each booklet has 70 marks worth of questions and will probably last two lessons, including time to go through answers with your students. There is one for each area of the new GCSE specification and they are designed to complement the PixiMaths year 11 SOL.

These problem solving starter packs are great to support students with problem solving skills. I've used them this year for two out of four lessons each week, then used Numeracy Ninjas as starters for the other two lessons.  When I first introduced the booklets, I encouraged my students to use scaffolds like those mentioned here , then gradually weaned them off the scaffolds. I give students some time to work independently, then time to discuss with their peers, then we go through it as a class. The levels correspond very roughly to the new GCSE grades.

Some of my favourite websites have plenty of other excellent resources to support you and your students in these assessment objectives.

@TessMaths has written some great stuff for BBC Bitesize.

There are some intersting though-provoking problems at Open Middle.

I'm sure you've seen it before, but if not, check it out now! Nrich is where it's at if your want to provide enrichment and problem solving in your lessons.

MathsBot  by @StudyMaths has everything, and if you scroll to the bottom of the homepage you'll find puzzles and problem solving too.

I may be a little biased because I love Edexcel, but these question packs are really useful.

The UKMT has a mentoring scheme that provides fantastic problem solving resources , all complete with answers.

I have only recently been shown Maths Problem Solving and it is awesome - there are links to problem solving resources for all areas of maths, as well as plenty of general problem solving too. Definitely worth exploring!

Math Word Problems

Welcome to the math word problems worksheets page at Math-Drills.com! On this page, you will find Math word and story problems worksheets with single- and multi-step solutions on a variety of math topics including addition, multiplication, subtraction, division and other math topics. It is usually a good idea to ensure students already have a strategy or two in place to complete the math operations involved in a particular question. For example, students may need a way to figure out what 7 × 8 is or have previously memorized the answer before you give them a word problem that involves finding the answer to 7 × 8.

There are a number of strategies used in solving math word problems; if you don't have a favorite, try the Math-Drills.com problem-solving strategy:

• Question : Understand what the question is asking. What operation or operations do you need to use to solve this question? Ask for help to understand the question if you can't do it on your own.
• Estimate : Use an estimation strategy, so you can check your answer for reasonableness in the evaluate step. Try underestimating and overestimating, so you know what range the answer is supposed to be in. Be flexible in rounding numbers if it will make your estimate easier.
• Strategize : Choose a strategy to solve the problem. Will you use mental math, manipulatives, or pencil and paper? Use a strategy that works for you. Save the calculator until the evaluate stage.
• Calculate : Use your strategy to solve the problem.
• Evaluate : Compare your answer to your estimate. If you under and overestimated, is the answer in the correct range. If you rounded up or down, does the answer make sense (e.g. is it a little less or a little more than the estimate). Also check with a calculator.

Most Popular Math Word Problems this Week

Arithmetic Word Problems

• Addition Word Problems One-Step Addition Word Problems Using Single-Digit Numbers One-Step Addition Word Problems Using Two-Digit Numbers
• Subtraction Word Problems Subtraction Facts Word Problems With Differences from 5 to 12
• Multiplication Word Problems One-Step Multiplication Word Problems up to 10 × 10
• Division Word Problems Division Facts Word Problems with Quotients from 5 to 12
• Multi-Step Word Problems Easy Multi-Step Word Problems

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Grade 9 Algebra Word Problems

Related Pages Grade 8 Algebra Word Problems Algebra Word Problems Solving Equations More Algebra Lessons

These lessons cover grade 9 algebra word problems involving age, distance, rate, time and coins with examples and step-by-step solutions. It includes various examples and solutions for algebra word problems that you will commonly encounter in 9th grade.

Age Word Problems

Age Problems with two unknowns or variables

Example: Taylor is five times as old as Spenser. The sum of their ages is eighteen. How old are Taylor and Spencer?

Solution: Let x represent Spenser’s age Therefore, Taylor’s age is 5x x + 5x = 18 6x = 18 x = 3 Therefore, Spenser is 3 years old and Taylor is 15 years old.

Grade 9 Algebra Word Problems - Age

Example 1: A mother is three times as old as her daughter. Six years ago, the mother’s age was six tines that of her daughter. How old are they now?

Solution: Let x represent the daughter’s age. Therefore, 3x is the mother’s age. 6(x - 6) = 3x - 6 6x - 6 = 3x - 6 3x = 30 x = 10 Therefore, the daughter’s is 10 years old and the mother is 30 years old.

Example 2: A father is now three times as old as his son. Eight years ago, the father was five times as old as his son. How old are they now?

Rate, Distance, Time Word Problems

Grade 9 Algebra Word Problems - Rate, Distance, Time

Example: A bus leaves the terminal and averages 40 km/hr. One hour late, a second bus leaves the same terminal and averages 50 km/hr. In how many hours will the second bus overtake the first?

Grade 9 Rate, Distance, Time Word Problems

Example 1: One motorist travels 5 km.hr faster than another. They leave from the same place and travel in opposite directions. What is the rate of each if they are 195 km apart after 3 hours?

Example 2: A pilot flew from airport A to airport B at a rate of 100 km/hr and flew back from airport B to airport A at 120 km/hr. The total time it took was 11 hours. How far is it from airport A to airport B?

Coin Word Problems

Grade 9 Algebra Word Problems - Coins

Example: A coin collection amounting to $25 consists of nickels and dimes. There are 3 times as many nickels and dimes. There are 3 times as many nickels as dimes. How many coins of each kind are there?

Solution: Let x = number of dimes 3x = number of nickels 10x + 5(3x) = 2500 25x = 2500 x = 100 Therefore, there are 100 dimes and 300 nickels.

Grade 9 Coin Algebra Word Problems

Example: Mr. Rogers has $4.62. He has 3 times as many dimes as nickels and 6 more pennies than dimes. How many coins of each kind does he have?

Coin Algebra Word Problems - Grade 9

Example: Bob has in his pocket a number of pennies, 5 times as many nickels as pennies and 5 more quarters than pennies. The coins amount to $2.27. Find the number of each kind of coin.

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Circle theorems

Here you will learn about circle theorems, including their application, proof, and how to use them to problem solve. You will learn how these theorems apply to angles formed by secant and tangent lines and how they apply to properties within a circle.

Students first learn about circle theorems in geometry where they learn how to apply the theorems to problem solve. Students use the concepts taught in precalculus and calculus as well as on standardized tests such as SATs and state assessments.

What are circle theorems?

Circle theorems verify properties that show relationships between angles formed by special lines and line segments and arcs within a circle. These theorems along with prior knowledge of other angle properties are used together to problem solve.

Let’s take a look in greater depth at the following:

Central angles

Chords of a circle.

• Circle and chord theorems

Subtended angles

Tangents of a circle.

Below is a summary of each theorem, along with a diagram. You need to remember all of these circle theorems and be able to describe each one in a sentence.

[FREE] Common Core Practice Tests (Grades 3 to 8)

Prepare for math tests in your state with these Grade 3 to Grade 8 practice assessments for Common Core and state equivalents. 40 multiple choice questions and detailed answers to support test prep, created by US math experts covering a range of topics!

Central angles are angles that have a vertex at the center of the circle and the sides of the angle are the radii of the circle.

Angle ABC is a central angle of circle B.

The degree measurement of a central angle is equal to the arc it intercepts.

Angle ABC=60^{\circ} and arc AC=60^{\circ}

Inscribed angles are angles that have a vertex on the edge of the circle and the sides are chords of the circle. The measurement of the inscribed angle is \cfrac{1}{2} the measurement of the arc it intercepts.

Angle CEA is an inscribed angle (subtended angle) and the measurement of this inscribed angle is 30^{\circ} because it intercepts an arc that is 60^{\circ}.

The inscribed angle is always \cfrac{1}{2} the measurement of the arc it intercepts.

Remember: A subtended angle is an angle inside a circle that is created by two chords that meet at a point on the circle.

Step-by-step guide: Central Angle

Chords are line segments inside a circle that have endpoints on the edge of the circle. The longest chord in a circle is the diameter. Chords create situations within a circle that can help us to solve problems.

If BO is perpendicular to LM and if BP is perpendicular to NQ and BO is congruent in length to BP, you can conclude that LM is congruent to NQ.

Step-by-step guide: Chords of circles

Step-by-step guide: Circle and chord theorems

Subtended angles of a circle form inscribed angles. When inscribed angles intercept the same arc they are congruent.

Angle KGM, angle KEM and angle KLM all intercept the same arc, arc KM. If arc KM is 60^{\circ}, then angle KGM=30^{\circ}, angle KEM=30^{\circ} and angle KLM=30^{\circ}.

So, \text{ angle } KGM \approx \text { angle } KEM \approx \text{ angle } KLM.

Subtended angles can form inscribed quadrilaterals and triangles.

A quadrilateral can be inscribed in a circle, meaning that all four vertices are on the edge of the circle, if the opposite angles of a quadrilateral are supplementary (sum to 180^{\circ} ).

Inscribed quadrilaterals are also called cyclic quadrilaterals.

Quadrilateral HIJG is inscribed in circle F , so opposite angles must be supplementary.

Inscribed triangle ABC has one side as the diameter of the circle D.

Triangle ABC is a right triangle because the intercepted arc of angle A is semi-circle CB which is 180^{\circ}.

The measure of the intercepted arc is half the measure of the arc it intercepts, so in this case, angle A=90^{\circ}

This is also known as the semicircle theorem.

Step-by-step guide: Subtended angles

Tangent lines are lines that touch the circle at one point called the point of tangency.

Line RS is tangent to circle T if and only if the line is perpendicular to the radius at point W. Point W is the point of tangency.

If two lines are tangent to a circle from an external point, the tangent lines will be congruent in length. The tangent line must be perpendicular to the radius at the point of tangency, so using congruent triangles, you can prove that the tangent lines are congruent.

Through HL (Hypotenuse Leg) you can prove that triangle STR is congruent to triangle WTR.

Therefore, by CPTPC (Corresponding parts of congruent triangles are congruent) you can conclude that segment SR is congruent to segment WR, which are the tangent segments.

Step-by-step guide: Tangents of a circle

Common Core State Standards

How does this apply to geometry?

• High School Geometry – Circles (HSG-C.A.2) Identify and describe relationships among inscribed angles, radii, and chords. Include the relationship between central, inscribed, and circumscribed angles; inscribed angles on a diameter are right angles; the radius of a circle is perpendicular to the tangent where the radius intersects the circle.

How to use circle theorems to solve problems

There are several ways to apply circle theorems to problem solve. For more specific step-by-step guides, check out the pages linked in the “What are circle theorems?” section above or read through the examples below.

In order to problem solve using circle theorems:

Recall the theorem.

Solve the problem.

Circle theorem examples

Example 1: central angle theorem.

Find the measure of angle A in circle D.

Angle A is an inscribed angle and is half the measure of the arc it intercepts.

2 Solve the problem.

Arc PC is the intercepted arc of angle A. Arc PC=42^{\circ} and angle A is an inscribed angle.

Angle A=21^{\circ}

Find the measure of arc WV in circle R.

Angle Angle W is an inscribed angle and is half the measure of the arc it intercepts.

Also, chord WV is congruent to chord WZ so the arcs they intercept are also congruent, meaning that arc WV is congruent to arc WZ.

Since angle W is 32^{\circ}, arc ZV is double that measurement.

32 \times 2=64

Arc ZV=64^{\circ}

The measurement of a full circle is 360^{\circ}, subtract 64^{\circ} from that, 360-64=296.

That means that the two congruent arcs, arc WZ and arc WV together equal 296^{\circ}.

Since both arcs are congruent, to find the measure of one of them divide 296 in half.

296 \div 2=148, arc WV=148^{\circ}

Find the value of x.

Segment LM and segment LN are tangent segments of circle P. When two lines come from the same external point and are tangent to the same circle, the tangent lines (segments) are congruent. In this case, LM is congruent to LN.

Since LN and LM are congruent, they are also equal.

LM=5x-9 and LN=3x+7

\begin{aligned}& 5 x-9=3 x+7 \\\\ & 2 x=16 \\\\ & x=8 \end{aligned}

In circle E, find the value of angle G.

Quadrilateral HIFG is inscribed in circle E. Inscribed quadrilaterals have opposite angles that are supplementary (sum to 180 ). Angle I \, + angle G=180

Since angle I \, + angle G=180 and angle I=3x-12 and angle G= 2x+15, you can write and solve the equation:

\begin{aligned}& 3 x-12=2 x+15 \\\\ & x=27 \end{aligned}

Since x=27, substitute that value in for x,

Angle G=2x+15=2(27)+15=69

Angle G=69^{\circ}

Triangle TQR is inscribed in circle P and TQ=QR=10. Find the length of the diameter, TR.

Angle Q is an inscribed angle of circle P and also an angle of the inscribed triangle TQR. The inscribed angle is half the measure of the arc it intercepts and in this case, angle Q intercepts semi-circle TR.

The semi-circle is 180^{\circ} , so angle Q=\cfrac{1}{2} \times 180=90. Angle Q is a right angle, so triangle TQR is an inscribed right triangle.

Using the Pythagorean theorem, you can solve for the diameter which is also the hypotenuse of the right triangle.

Pythagorean theorem, a^2+b^2=c^2 where TQ and RQ are a and b.

\begin{aligned}& 10^2+10^2=c^2 \\\\ & 100+100=c^2 \\\\ & 200=c^2 \\\\ & 14.1=c \text { (rounded to } 1 \text { decimal place }) \end{aligned}

The diameter, TR, length is 14.1 units.

In circle C, the diameter is 14 units and JK is 3 units. Find the length of GH.

In circle C, since the diameter is 14 units the radius is half of that. So, the radius length is 7 units. The diameter is also perpendicular to GH, so it also bisects GH meaning that it cuts it in half, GJ=JH.

Triangle CJG is a right triangle because the diameter is perpendicular to GH forming a right triangle.

Using the fact that CJG is a right triangle, apply the Pythagorean theorem to find the missing side, JG.

CG is the radius of the circle which is 7 units.

CK is also a radius of the circle which is 7 units. If you subtract JK from CK you get the value of CJ (given the information that JK=3 units).

Using the Pythagorean theorem, a^2+b^2=c^2 where CJ is a and the radius (CG) is c.

\begin{aligned}& 4^2+b^2=7^2 \\\\ & 16+b^2=49 \\\\ & b^2=33 \\\\ & b \approx 5.7 \text { (rounded to } 1 \text { decimal place) } \end{aligned}

GJ=5.7 which means that JH=5.7 So, GH=5.7+5.7=11.4

Teaching tips for circle theorems

• Provide opportunity for students to discover the theorems and make conjectures using compasses and protractors.
• Use digital platforms such as Desmos so students can investigate strategies to problem solve using the circle theorems.
• Have students use online platforms such as Khan Academy which contain tutorials created by math tutors to practice exam questions and to prepare for the SAT.
• Although worksheets provide an opportunity for students to practice skills, using digital platforms that focus on gameplay is more effective in engaging students.

Easy mistakes to make

Practice circle theorems questions

1. In circle B, find the measure of angle ABC.

Angle D is an inscribed angle and intercepts arc AC. Inscribed angles are half the measure of the arcs they intercept so arc AC=72 \times 2=144^{\circ}.

Angle ABC is a central angle and the central angle is equal in measure to the arc it intercepts. So, if arc AC is 144^{\circ}, then angle ABC=144^{\circ}.

2. Find the measure of \theta.

Inscribed angles that intercept the same arc are congruent to each other.

Angle DAC and angle CBD are inscribed angles that both intercept arc CD. This means that angle DAC is equal to angle CBD.

So, if angle DAC=11^{\circ}, then angle CBD=11^{\circ}.

3. Triangle ABC is inscribed in circle D. Find the measure of ϴ.

AC is the diameter of circle D and the inscribed angle ABC intercepts semi-circle AC. The semi-circle is 180^{\circ}.

Inscribed angles are half the measure of the arcs they intercept. So, angle ABC=90^{\circ}, angles in a triangle sum to 180^{\circ}.

To find \theta (angle ACB ) =180-(90+53)=37^{\circ}.

4. Quadrilateral ABCD is inscribed in the circle, find the value \theta.

Quadrilaterals inscribed in circles have interior angles where the opposite angles are supplementary (sum to 180^{\circ} ).

In this case, angle D \, + angle B=180^{\circ}, so to find the missing angle, 63^{\circ}+\theta=180^{\circ}, \theta=117^{\circ}.

5. In circle C, \, GH=16 units and CJ=6 units, find the length of the diameter DK.

Since the diameter is perpendicular to chord GH it also bisects chord GH so GJ=JH. \, GH=16 so half of that is 8, \, GJ=8 and JH=8.

Draw in a radius to make a right triangle and use the Pythagorean theorem.

Triangle GJC is a right triangle where sides CJ=6, \, GJ=8 and the hypotenuse is CG (also the radius). Using the Pythagoras’ theorem, 6^2+8^2=c^2, 36+64=c^2, 100=c^2, \mathrm{~c}=10.

Since the radius is equal to 10, the diameter is equal to 2 \times 10=20.

6. Find MP in circle L.

Two lines that are coming from the same external point and are tangent to the same circle are congruent. In this case, MP=NP, so the equation to solve for x is,

Substitute the value of x into the algebraic expression that represents MP. \, M P=6 x-3,6(10)-3=57.

Circle theorem FAQs

Arc length is the distance between the two endpoints of an arc. The arc length is part of the circumference of a circle which should not be confused with the measure of an arc. An arc can have a degree measure because it is a portion of the full 360^{\circ} of a circle and it can also have length.

The definition of a circle is a locus of points. This means it is the set of all points that are the same distance from a fixed point. The distance of the set of points from a fixed point is the radius length of a circle and the fixed point is the centre of the circle.

Yes, sometimes with the different circles, you need to use trigonometry to find the size of the angles within the triangle.

The next lessons are

• Types of data
• Averages and range
• Representing data

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The Boy Who Harnessed the Wind Math Movie Guide Questions | Word Problems

Subject: Mathematics

Age range: 11 - 13

Resource type: Worksheet/Activity

Last updated

14 September 2024

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This product includes a zip file consisting of:

• An Answer Key w/ CCSS Alignment (4 Pages)
• A Student Movie Guide (4 Pages)
• A DIFFERENTIATED Student Movie Guide (4 Pages) (Includes hints and formulas necessary to solve the problem)
• 2 PDFs with link to both student Google Slide versions (2 Pages)
• CCSS alignment, Admin Movie Request and Permission Slip (2 Pages)

This resource is meant to supplement the viewing of this movie, see the IMDb listing by searching the movie title.

Check the preview file for high resolution sample questions to see if this math focused movie guide is suitable for your students. This resource consists of 10 math related questions and 2 optional long format questions that will do more than just ask your students to regurgitate information.

General Tips for Using the Print version of this Movie Guide: Print one, double-sided movie guide for each student Preview the next question on the movie guide as you complete each one, this can help students pay attention to important upcoming events. If students work together, discourage students from simply copying answers. Randomly choose a student to share their answer and defend it if necessary. Optionally, after completing the math questions, allow 5-10 minutes for each ELA question at the end of the film.

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