Complementary and Supplementary Angles is one of thousands of math lessons at MathHelp.com.

Complementary and Supplementary Angles

We offer a complete lesson on Complementary and Supplementary Angles with a personal math teacher.

  • video examples
  • guided practice
  • interactive self tests
  • printable worksheets and more

Lesson Description:

Students learn that two angles that have a sum of 90 degrees are complementary angles, and two angles that have a sum of 180 degrees are supplementary angles. Students also learn to find the complement of a given angle by subtracting the measure of the angle from 90, and find the supplement of a given angle by subtracting the measure of the angle from 180.