• #### Flowchart Proofs - Concept

##### Math›Geometry›Triangles
How to outline a flowchart proof.
• #### Trapezoid Properties - Concept

##### Math›Geometry›Polygons
How to identify a trapezoid and its special properties.
• #### Area of Regular Polygons - Concept

##### Math›Geometry›Area
How to derive the formula to calculate the area of a regular polygon.
• #### Flowchart Proofs - Problem 1

##### Math›Geometry›Triangles
How to prove that two segments are congruent in a trapezoid with diagonals.
• #### Types of Triangles - Concept

##### Math›Geometry›Geometry Building Blocks
How to classify a triangle based on its side lengths and angle measures.
• #### Area of Regular Polygons - Problem 1

##### Math›Geometry›Area
How to calculate the area of a regular polygon, given the length of the apothem and side length.
• #### Area of Regular Polygons - Problem 4

##### Math›Geometry›Area
How to find the area of a regular hexagon given only the length of the apothem.
• #### Trigonometric Ratios: Sine - Problem 2

##### Math›Geometry›Basic Trigonometry
How to find the length of a base in an isosceles triangle given the vertex angle and a leg length.
• #### Vertex and Diagonals - Concept

##### Math›Geometry›Geometry Building Blocks
How the vocabulary word vertex applies to different objects in Geometry.
• #### Tangent Segments to a Circle - Problem 2

##### Math›Geometry›Circles
How to find the measure of an angle formed by a chord drawn between two points of tangency.
• #### Area of Regular Polygons - Problem 3

##### Math›Geometry›Area
How to calculate the perimeter of a regular polygon given the area and apothem length.
• #### Trigonometric Ratios: Sine - Problem 2

##### Math›Trigonometry›Basic Trigonometry
How to find the length of a base in an isosceles triangle given the vertex angle and a leg length.
• #### Trigonometric Ratios: Sine - Problem 2

##### Math›Precalculus›Basic Trigonometry
How to find the length of a base in an isosceles triangle given the vertex angle and a leg length.
• #### Trapezoid Arch and Panel Design Problem - Problem 2

##### Math›Geometry›Polygons
How to find the measures of a trapezoid in a five-block arch.
• #### Trapezoid Arch and Panel Design Problem - Concept

##### Math›Geometry›Polygons
How to strategize about solving a problem with trapezoidal arches.
• #### Center and Apothem of Regular Polygons - Concept

##### Math›Geometry›Area
How to define the apothem and center of a polygon; how to divide a regular polygon into congruent triangles.
• #### Area of Regular Polygons - Problem 2

##### Math›Geometry›Area
How to find the length of an apothem in a regular polygon given the area and side length.
• #### Trapezoid Arch and Panel Design Problem - Problem 1

##### Math›Geometry›Polygons
How to find the measures of a trapezoid in a 10-panel design.
• #### Center and Apothem of Regular Polygons - Problem 1

##### Math›Geometry›Area
How to find the length of an apothem in a regular polygon given a side length and the number of sides.
• #### 45-45-90 Triangles - Problem 2

##### Math›Trigonometry›Pythagorean Theorem
How to find the length of a leg in a 45-45-90 given the hypotenuse.