radian (rad.)

radian (rad.): A unit of plane angle measure equal to the angle subtended at the center of a circle by an arc equal in length to the radius of the circle. Note: One radian is equal to 360°/2

, which is approximately 57° 17' 44.6".

This HTML version of FS-1037C was last generated on Fri Aug 23 00:22:38 MDT 1996