Question

find the measure of the missing angle. 100° a answer attempt 1 out of 2 a =

Explanation:

Step1: Recall angle - sum property

The two angles are supplementary (a straight - line forms an angle of $180^{\circ}$).

Step2: Calculate the missing angle

Let the missing angle be $a$. We know that $a + 100^{\circ}=180^{\circ}$. So, $a=180^{\circ}-100^{\circ}=80^{\circ}$.

Answer:

$80^{\circ}$