Question

1. choose the best answer. use your protractor on the monitor to find the measure of the angle. options: 90 degrees, 40 degrees, 20 degrees, 130 degrees

Explanation:

Step1: Recall Protractor Usage

To measure an angle, align the protractor's center with the vertex, and one ray with the 0° mark. Then read the measure of the other ray.

Step2: Analyze the Angle

The angle in the diagram is acute (less than 90°). Among the options, 90° is right, 130° is obtuse, 40° is acute but larger, and 20° is a small acute angle matching the diagram's appearance.

Answer:

20 degrees (the option with "20 degrees")