Radian
Unit of angle
The radian, denoted by the symbol rad, is the unit of angle in the International System of Units and is the standard unit of angular measure used in many areas of mathematics. It is defined such that one radian is the angle subtended at the centre... Wikipedia
1 rad in: is equal to
degrees: 180/π° ≈ 57.296°
gradians: 200/π grad ≈ 63.662g
milliradians: 1000 mrad
Symbol: rad, R
turns: 1/2π turn
Unit of: angle