Question

Choose the correct word and fill in the blanks :

Supplementary angles are two angles whose measures add to …………….. ($90°/180°$).

Answer 1

Supplementary angles :

In the given figure the sum of $\angle AOB$ and $\angle BOC$ is $180°$, (i.e. $110°+70°=180°$).

So, $\angle AOB$ and $\angle BOC$ are supplementary angles.

Hence supplementary angles are two angles whose measures add to $180°$.