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A protractor can be used to measure an angle.
The instrument used to measure a angle is called a protractor!
a protractor, however, that wouldn't really be used in the real world obviously. However, if you're doing a math problem, and it says that the image is drawn to scale, you can use a protractor to find the angle of elevation. however, angle of elevation questions are usually solved via trigonometry. So, if possible, look to see if you can apply sin cos or tangent to the question.
A protractor is commonly used on two-dimensional renderings.
A protractor.