Geometry

Question Analysis

This question is about measuring an angle using a protractor when there's no obvious 0 - degree starting point. The main focus is correctly using the protractor's scale to calculate the angle's measure.

 

Key Concept Explanation

A protractor has two scales (inner and outer). When both sides of the angle intersect the protractor away from the 0 - degree mark, we find the difference between the scale values on the same scale where the two sides intersect.

 

Step - by - Step Solution

1. Notice that both sides of the angle intersect the outer scale. One side intersects at approximately 130° and the other at around 40°.

 

2. Calculate the angle by subtracting the smaller value from the larger one:

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