Question

question 16 find the measure of the missing angle.

Explanation:

Step1: Recall angle - sum property

The sum of angles on a straight - line is 180°.

Step2: Set up equation

Let the missing angle be \(a\). We have \(a + 39^{\circ}=180^{\circ}\).

Step3: Solve for \(a\)

Subtract 39° from both sides of the equation: \(a=180^{\circ}-39^{\circ}\).
\(a = 141^{\circ}\)

Answer:

\(141^{\circ}\)