Geometry

Question Analysis

This question is about using a protractor to measure an angle.

 

Key Concept Explanation

A protractor has two scales (inner and outer), ranging from 0° to 180°. Align one side of the angle with the 0° mark on the protractor and read the value where the other side intersects the appropriate scale.

 

Step - by - Step Solution

1. First, identify the correct scale:

The initial side of the angle is on the  mark on the right - hand side of the protractor, so we should use the inner - ring scale.

 

2. Then, read the measurement:

Locate where the terminal side of the angle intersects the inner - ring scale. The terminal side intersects the inner - ring scale at