Question

Find the supplementary angle of $(x-30)°$

Answer 1

Two angles are said to be supplementary if their sum is $180°$.

Let the required angle be a

Then, $a+(x-30)°=180°$

$$\begin{gathered} \Rightarrow a=180°-x°+30° \\ \Rightarrow a=210°-x° \end{gathered}$$

so, the supplementary angle of $(x-30)°$ is $(210-x)°$