Question

12 use a protractor to estimate the angle.

Explanation:

Step1: Align protractor vertex

Place protractor center on angle's vertex, align one ray with protractor's 0° mark.

Step2: Measure the angle

Read the protractor scale where the second ray intersects it. The angle is obtuse, so use the outer scale.

Answer:

Approximately $150^\circ$ (acceptable range: $145^\circ$ to $155^\circ$)