# Supplementary angles - a pair of angles whose sum is always _

- Author:
- Zawierucha, Duane Habecker

- Topic:
- Angles

Use this applet to understand what the sum of supplementary angles will always be.
(FYI: supplementary angles do not necessarily need to be adjacent angles, but when they are they can also be called a linear pair.)

## Definition of supplementary angles

Write a good definition for supplementary angles.