Arc Length of a Circle

Written by Jerry Ratzlaff on . Posted in Plane Geometry

arc Length of a Circle

A sector is a fraction of the area of a circle.

arc Length of a  formula

$$l = \theta \; r \;\;$$   (when $$\; \theta \;$$ is in radians)

$$l = \theta \; \frac { \pi } { 180 } r \;\;$$   (when $$\; \theta \;$$ is in degrees)

Where:

$$l$$ = length

$$\pi$$ = Pi

$$r$$ = radius

$$\theta$$ = angle