Question

find the measure of the missing angle. 123° a answer a =

Explanation:

Step1: Recall angle - sum property

Adjacent angles on a straight - line sum to 180°.

Step2: Set up the equation

Let the missing angle be \(a\). We have \(a + 123^{\circ}=180^{\circ}\).

Step3: Solve for \(a\)

\(a=180^{\circ}- 123^{\circ}\).

Answer:

\(a = 57^{\circ}\)