Question

find the measure of the missing angle. 100° a

Explanation:

Step1: Recall angle - sum property

The two angles are supplementary, meaning their sum is 180°.
Let the missing angle be \(a\). We have the equation \(a + 100^{\circ}=180^{\circ}\).

Step2: Solve for \(a\)

Subtract 100° from both sides of the equation: \(a=180^{\circ}- 100^{\circ}\).

Answer:

\(80^{\circ}\)