Question

find the measure of the missing angle. answer attempt 1 out of 3 a =

Explanation:

Step1: Recall angle - addition property

The two angles are supplementary, meaning their sum is 180°. So we have the equation $63^{\circ}+a = 180^{\circ}$.

Step2: Solve for $a$

Subtract 63° from both sides of the equation: $a=180^{\circ}- 63^{\circ}$.
$a = 117^{\circ}$

Answer:

$117^{\circ}$