Question

Find the supplement of $20°+y$.

Answer 1

we know that when the sum of the two angles is $180°$,then they are supplementary angles.

As per the question, the given angle is $20°+y$.

Then its supplement is $=180°-\left(20°+y\right)$

$$\begin{gathered} =180°-20°-y \\ =160°-y \end{gathered}$$

Hence, the supplement of $20°+y$ is $160°-y$.