Two angles and for which are said to be supplementary. In other words, and are supplementary angles if they produce a straight angle when combined.

# Supplementary Angles

## See also

Angle, Complementary Angles, Digon, Straight Angle Explore this topic in the MathWorld classroom## Explore with Wolfram|Alpha

## Cite this as:

Weisstein, Eric W. "Supplementary Angles."
From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/SupplementaryAngles.html