How to apply the triangle angle sum theorem.
How to derive the formula to find the sum of angles in any polygon.
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 identify supplementary and complementary angles.
How the vocabulary word vertex applies to different objects in Geometry.
How to construct parallel lines using three different methods.
How to simplify square roots using two different methods.
How to define arc length and how it is different from arc measure; how to calculate the length of an arc.