Radian (English)
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Definition (advanced level)
A unit of angle, chosen so that the number of radians in a full circle is exactly twice π. This simplifies the formulas for things like the area of a sector in a circle.
One radian is approximately 57.29578 degrees. The symbol for radians is rad.
One radian is approximately 57.29578 degrees. The symbol for radians is rad.
Relations
- broader:
- (en) Units of angle
- references:
- (en) Angle
- referenced:
- (en) Angle
- (en) Area of segment
- (en) rad
- see also:
- (en) Grade
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