3-Geometry-Plane-Angle-Size

degree of angle

Circles can divide into 360 equal arcs {degree, angle}. Degrees can divide into 60 parts {minute, angle}. Minutes can divide into 60 parts {second, angle}.

grad

Angle units {grad} {grade, angle} can equal 1/100 right angle.

perigon

2*pi radians, or 360 degrees, make one revolution {perigon}.

radian

Circles with one-unit-length radius have circumference 2*pi radians, so 360 degrees equals 2*pi radians {radian, angle}. One radian equals 360 / (2 * pi) degrees or 57 degrees.

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3-Geometry-Plane-Angle

Drawings

Drawings

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Date Modified: 2022.0225