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′
4
4. 6″.
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′
4
4. 6″.