Angular measure is a type of measurement used to describe the size of an angle. It is typically measured in degrees, radians, minutes, and mils. A DEGREE is a unit of angular measure equal to 1/360 of a full rotation. A radian is a unit of angular measure equal to the angle subtended at the center of a circle by an arc that is equal in length to the radius of the circle. A MINUTE is a unit of angular measure equal to 1/60 of a DEGREE. A mil is a unit of angular measure equal to 1/6400 of a full rotation.