04:57
Angles, Arcs and Sectors: Complementary and Supplementary Angles
This clip explains that any two angles that have a sum of 90 degrees are called complementary angles. The clip adds that knowing two angles are complementary allows us to find the measure of one angle when we know the measure of the other. The clip ...
01:12
Angles, Arcs and Sectors: Different Types of Angles
This clip introduces some of the most common angles, including the 90-degree angle (also known as the right angle), the 180-degree angle (also known as the straight angle), the acute angle and the obtuse angle.