If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Radians & arc length


Write a formula for the arc length S in terms of r for the following figure.
A circle with a radius of r centimeters. There are two radii that highlight a sector. The measure of the arc is S centimeters. The central angle measuring five point six radians.
The angle in the figure is a central angle in radians.