[b]Explore below to find out what the sum of the exterior angles of a polygon is.[/b][br][br]The exterior angles of a triangle, quadrilateral, and pentagon are shown, respectively, in the applets below, but the conclusion you come up with can be extended to apply to polygons with any number of sides. [br][br][br][b]How to use the applet: [br][/b][br]Control the size of a colored exterior angle by using the slider of matching color. [br]Move the vertices of these polygons anywhere you'd like. [br][br]For the quadrilateral & pentagon, the last two applets work best if these polygons are kept convex.