So 1° (degree) = 60 arcminutes and 1 arcminute = 60 arcseconds.Ī protractor is commonly used in geometry lessons by elementary school students where they learn how to measure angles. An arcminute is the 60th part of a degree. There are also protractors that are built for precision which further divide degrees into arcminutes. You may also find some that are divided in 90 (quarter of a circle) and 360 (full circle) equal parts. There are protractors divided into different parts, but the must commons are divided in 180 equal parts (half of circle or half-disc). ![]() Measuring angles with a protractor is usually done in degrees (°) and sometimes in radians (rad or c). ![]()
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