Turn (geometry)

Counterclockwise rotations about the center point where a complete rotation is equal to 1 turn

The circumference of the unit circle (whose radius is one) is 2π.

An arc of a circle with the same length as the radius of that circle corresponds to an angle of 1 radian. A full circle corresponds to a full turn, or approximately 6.28 radians, which are expressed here using the Greek letter tau (τ).

A turn is a unit of plane angle measurement equal to 2 $π$ radians, 360° or 400 gon. A turn is also referred to as a revolution or complete rotation or full circle or cycle or rev or rot.

A turn can be subdivided in many different ways: into half turns, quarter turns, centiturns, milliturns, binary angles, points etc.

单词	Unit angle
释义	Unit angle 英语百科 Turn (geometry) A turn is a unit of plane angle measurement equal to 2 $π$ radians, 360° or 400 gon. A turn is also referred to as a revolution or complete rotation or full circle or cycle or rev or rot. A turn can be subdivided in many different ways: into half turns, quarter turns, centiturns, milliturns, binary angles, points etc.
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Unit angle

Turn (geometry)