Convert [math]40^\circ[/math] to radians.

[list=1][br][*]Set up a proportion.[br][*]Multiply both sides by [math]\pi[/math] to solve for [math]x[/math].[br][/list][br][br]This applet is provided by Walch Education as supplemental material for their mathematics programs. Visit [url=http://www.walch.com]www.walch.com[/url] for more information.