Question

An angle of measure ${30}^{\circ }$ and twice of another angle x are supplementary angles. Find the value of x (in degrees).

• A. 75

Answer 1

The correct option is A 75

Two angles are called supplementary angles if their sum is 180${}^{\circ }$.

So, 30${}^{\circ }$ + 2x = 180${}^{\circ }$

Hence, x = 75${}^{\circ }$.