45-45-90 Triangles
The ratios of the 45-45-90 triangle will be derived using the Pythagorean Theorem. The properties of the special triangles can then be applied to the trigonometric ratios of sine and cosine. 
30-60-90 Triangles
The ratios of the 30-60-90 triangle will be derived using the Pythagorean Theorem. The ratios when the be applied to quickly find the side lengths of any 30-60-90 triangle.
Polygon Angles
This problem set deals with the internal and external angles of the polygons up to an octagon.