Question

The sum of two complementary angles is equal to -

• A. ${90}^o$
• B. Right angle
• C. More than ${90}^o$
• D. Less than ${90}^o$

Answer 1

Answer: (A), (B)

Right angle

The complementary angles are those angles whose sum is equal to ${90}^o$ or right angle.

For example, ${30}^o$ and ${60}^o$ are complementary angles as ${30}^o+{60}^o={90}^o$

So, option $\left(a\right)$ and $\left(b\right)$ are correct.