the unit of plane angle adopted under the Systeme International dUnites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)
[ Syn: rad ]
the unit of plane angle adopted under the Systeme International dUnites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)
[ Syn: rad ]