Question 37391: What are complementary and supplementary angles? The text book is by McDougal Littell. Middle school math. Answer by fractalier(6550) (Show Source):
You can put this solution on YOUR website! Complementary angles are angles which add up to 90 degrees, e.g. a 70 degree angles and a 20 degree angle.
Supplementary angles are angles which add up to 180 degrees, e.g. a 109 degree angle and a 71 degree angle.
