I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

In this video, I will show you how to solve for the missing angles using supplementary, complementary, and Vertical Angles.

Construct a convex octagon with four right angles. It probably says a lot about me as a teacher that I assign problems like this. I watch as students try to arrange the right angles consecutively.

A square has four right angles (90°). Each diagonal splits a corner into two angles of 45°. Note also that the diagonals cut each other in half at right angles. A rectangle has four right angles. The ...