Geometry

Question Analysis

This question involves 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 and read the value where the other side intersects the scale.

 

Step - by - Step Solution

1. Determine the appropriate scale:

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

 

2. Read the measurement:

Follow the terminal side of the angle to where it intersects the inner - ring scale. The terminal side intersects the inner - ring scale at

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