Complementary and Supplementary Angles

This video tutorial explains how to find the measure of one acute angle in a right triangle when the other is known. It reviews the properties of triangle angles, emphasizing that the sum of angles in a triangle is 180 degrees. The lesson highlights that acute angles in a right triangle are complementary, summing to 90 degrees. The tutorial also clarifies the difference between complementary and supplementary angles, using a sheet of paper as a visual aid. By stretching a right triangle, the video demonstrates how the acute angles co-vary, maintaining their complementary relationship.

What is the sum of all angles in any triangle?

• 360 degrees

• 90 degrees

• 270 degrees

• 180 degrees

In a right triangle, what is the relationship between the two acute angles?

• They are supplementary

• They are complementary

• They are congruent

• They are equal

What happens to the acute angles of a right triangle when one side is stretched?

• They remain the same

• They become equal

• They become supplementary

• They change together

What is the measure of complementary angles?

• 360 degrees

• 270 degrees

• 180 degrees

• 90 degrees

Which analogy helps differentiate between complementary and supplementary angles?

• A triangle

• A sheet of paper

• A circle

• A clock

What is the measure of supplementary angles?

• 360 degrees

• 90 degrees

• 270 degrees

• 180 degrees