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 angle is 180°).
Let the given angle be 100° and the missing angle be \(a\). The equation is \(a + 100^{\circ}=180^{\circ}\).

Step2: Solve for \(a\)

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

Answer:

\(80^{\circ}\)