. What do you mean by Protractor?
A protractor, in math, is considered to be a virtual measuring device that is in the form of a semi-circle. The standard protractor is a translucent device that allows us to measure angles in degrees. A radian scale protractor measures an angle in radians. See the figure given below. We can see that a standard protractor has degrees which marked clockwise from 0° to 180° on the outer scale and anti-clockwise from 0° to 180° on the internal scale.
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