# Complementary Meaning?

In the app below, the two colored angles are said to be

**complementary angles**.## Interact with this app for a few minutes. LARGE POINTS are moveable.

In your own words, describe what you think it means for 2 angles to be complementary.

In the app above, one colored angle is said to be the * complement *of the other colored angle, and vice versa.
Given this information, determine the

*complement*of a 40 degree angle.

What is the complement of an angle that measures 1 degree?

What angle has a measure whose complement is equal to itself?