A protractor is used to measure an angle.
the measure of an angle is the degrees of an angle.
The measure of the exterior angle.
No cheating!
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A protractor is used to measure an angle.
A protractor can be used to measure an angle.
The instrument used to measure a angle is called a protractor!
The instrument you are looking for is a compass
A protractor.
the vertex of the angle
A protractor is used to measure an angle
A sextant.
Flexing is the medical term meaning decreasing an angle as in bending a joint.
A protractor is an instrument that is used when you need to measure an angle.
Some of the devices used to measure angle are Transit, Protractor and Compass.
Not sure what an instermant is, but an appropriate instrument is a protractor.