Question

the measure of an angle is 131.6°. what is the measure of its supplementary angle?

Explanation:

Step1: Recall supplement - angle formula

Let the given angle be $\theta = 131.6^{\circ}$. The measure of its supplementary angle $\alpha$ satisfies $\theta+\alpha = 180^{\circ}$.

Step2: Solve for the supplementary angle

$\alpha=180^{\circ}-\theta = 180 - 131.6=48.4^{\circ}$

Answer:

48.4