• #### 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.
• #### Parallelogram Properties - Problem 1

##### Math›Geometry›Polygons
How to solve for variables when given the angles of a parallelogram in terms of those variables.
• #### Cyclic Quadrilaterals and Parallel Lines in Circles - Concept

##### Math›Geometry›Circles
How to prove that opposite angles in a cyclic quadrilateral are congruent; how to prove that parallel lines create congruent arcs in a circle.
• #### The Sine Addition Formulas - Problem 2

How to derive the sine of a difference formula and use it to find the sine of an angle.
• #### The Sine Addition Formulas - Problem 2

How to derive the sine of a difference formula and use it to find the sine of an angle.
• #### 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 - Concept

##### Math›Geometry›Polygons
How to identify all of the special properties of parallelograms and use them to solve problems.
• #### 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.
• #### Special Isosceles Triangle Properties - Concept

##### Math›Geometry›Triangles
How to identify a segment from the vertex angle in an isosceles triangle to the opposite side.
• #### Transforming the Tangent Graph - Concept

##### Math›Trigonometry›Trigonometric Functions
How to graph y = tan(q) for one or more periods.
• #### Transforming the Tangent Graph - Concept

##### Math›Precalculus›Trigonometric Functions
How to graph y = tan(q) for one or more periods.
• #### Graphing the Reciprocal Trigonometric Functions - Problem 2

##### Math›Trigonometry›Trigonometric Functions
How to graph y = csc q.
• #### Graphing the Reciprocal Trigonometric Functions - Problem 3

##### Math›Trigonometry›Trigonometric Functions
How to graph y = cot q.
• #### Solving Trigonometric Equations - Problem 3

How to solve a simple trig equation involving secant.