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 define inductive reasoning, and how to find numbers in a sequence.
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.