How to find the measure of one angle in any equiangular or regular polygon.
How to find the sum of the exterior angles in a polygon and find the measure of one exterior angle in an equiangular polygon.
How to classify a triangle based on its side lengths and angle measures.
How to strategize about solving a problem with trapezoidal arches.
How to define a rectangle and a square.
How to derive the formula to calculate the area of a regular polygon.