Geometry

Question Analysis

This question requires measuring an angle with a protractor.

 

Key Concept Explanation

A protractor has two scales (inner and outer) 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. First, identify the correct scale:

The initial side of the angle is aligned with the  mark on the left - hand side of the protractor. So, we need to use the outer - ring scale for measurement.

 

2. Then, read the measurement:

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

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