Answer :
If two angles are supplementary, then the sum of their measures is 180 degrees. In the image attached below, these angles are supplementary because the sum of their measures equals 180°. When two angles are supplementary, we say that one angle is the supplement of the other.
![View image TheBlueFox](https://us-static.z-dn.net/files/d31/d693a2011209c1ea2432ba311fce82bc.png)