The semicircular shaped instrument is called ____.

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Solution

The protractor: It is a semi-circular device graduated into 180 equal divisions, each division represents one unit measure of an angle, called a degree. The measure s starts from 0° on the right-hand side and ends with 180° on the left-hand side and vice-versa. It is used to draw and measure angles.
Hence, the semicircle shaped instrument is called protractor.

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