Arc Length of a Circle

Written by Jerry Ratzlaff on . Posted in Plane Geometry

arc Length of a Circlecircle arc length

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