• #### Angle Bisectors and Opposite Side Ratios - Concept

##### Math›Geometry›Similarity
How to relate the sides of an angle bisected and the lengths of the opposite side.
• #### Angle Bisectors and Opposite Side Ratios - Problem 2

##### Math›Geometry›Similarity
How to find a missing length, given the length of the opposite side in a triangle.
• #### Angle Bisectors and Opposite Side Ratios - Problem 1

##### Math›Geometry›Similarity
How to find a missing length created by a median in a triangle using a proportion.
• #### Rays - Concept

##### Math›Geometry›Geometry Building Blocks
How to identify, define, and label rays and opposite rays.
• #### Definition and Domain of a Rational Expression - Problem 3

##### Math›Algebra 2›Rational Expressions and Functions
How to cancel opposites in a rational expression.
• #### Definition and Domain of a Rational Expression - Problem 4

##### Math›Algebra 2›Rational Expressions and Functions
How to simplify a rational expression that contains opposite factors.
• #### Adding Vectors - Problem 2

##### Math›Precalculus›Vectors and Parametric Equations
How to plot the sum of two vectors (one the opposite of the other) and find its magnitude.
• #### Multiplying and Dividing Rational Expressions - Problem 2

##### Math›Algebra 2›Rational Expressions and Functions
How to divide rational expressions involving an opposite.
• #### The Cross Product of Vectors - Problem 1

##### Math›Precalculus›Systems of Linear Equations and Matrices
How to show that when you reverse the order of a cross product, you get the opposite result.
• #### Simplifying Rational Functions with Factoring and GCFs - Problem 4

##### Math›Algebra›Rational Expressions and Functions
How to simplify rational expressions when there are opposite factors.
• #### Parallelogram Properties - Concept

##### Math›Geometry›Polygons
How to identify all of the special properties of parallelograms and use them to solve problems.
• #### Parallelogram Properties - Problem 3

##### Math›Geometry›Polygons
How to find the lengths of the diagonals in a parallelogram if they are given in terms of a variable.
• #### Parallelogram Properties - Problem 1

##### Math›Geometry›Polygons
How to solve for variables when given the angles of a parallelogram in terms of those variables.
• #### Parallelogram Properties - Problem 2

##### Math›Geometry›Polygons
How to find the perimeter of a parallelogram when the sides are given in terms of a variable.
• #### Constructing Altitudes - Problem 2

##### Math›Geometry›Constructions
How to construct an altitude in an obtuse triangle.
• #### Adding and Subtracting - Problem 2

##### Math›Pre-Algebra›Whole Numbers
Using opposite operations to solve for a variable in a one-step equation
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• #### Constructing Altitudes - Concept

##### Math›Geometry›Constructions
How to define an altitude and draw them on acute, right, and obtuse triangles.
• #### Constructing Altitudes - Problem 1

##### Math›Geometry›Constructions
How to construct an altitude in an acute triangle.
• #### Square Roots - Problem 1

##### Math›Pre-Algebra›Decimals and Percents
Squaring and finding a square root as opposite operations, including work with negatives
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• #### Square Roots - Problem 3

##### Math›Pre-Algebra›Decimals and Percents
Introduction to cubing a number and cube roots as opposite operations
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