Alphabetical

radian

[noun]

The radian is the SI unit for angular measure. One radian is equal to the angle at the center of a circle made by a slice of that circle in which the distance around the circumference is equal to the radius of the circle (one arc length). One complete circle equals 2π radians.


Sign in or register

For an ad-free experience and access the Visionlearning Classroom, sign in or register.