What does supplementary mean?

1 Answer
Zor Shekhtman
Dec 28, 2015

The question, most likely, is about supplementary angles.
Two angles are called supplementary if a sum of their measures equals to #180^o# (in degrees) or #pi# radians.

Explanation:

On a picture below angles #/_KML# and #/_KMH# are supplementary.
They also happened to be adjacent to better illustrate that their sum equals to #180^o#, but this is not necessary since supplementary angles can be positioned anywhere.

enter image source here

Here is a more general position of two supplementary angles:
enter image source here

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