Question

Find the angle which is equal to its supplement.

Answer 1

Let $x$ be two equal angles of its supplement.
Therefore, $x + x = 180\degree$ [Supplementary angles]
$\Rightarrow 2x = 180$
$\Rightarrow x = \frac{180\degree}{2}= 90\degree$

Thus, $90\degree$ is equal to its supplement.

Read more: Supplementary and Complementary Angles