You can also find the exterior angle measures of a regular polygon by using either the value you obtained for the interior angles, or by a simpler method... This lady will elaborate on both. Please excuse her accent, everything else about her explanation is superb.

Now, try calculating the interior and exterior angles of regular polygons with increasingly many sides. Try 5, 10, 20, 50, 100.... You can even try some of the even bigger numbers on the chart at the bottom of this page. What do you notice about the angles as the number of sides increases? Look back at the picture on the "Classifying Polygons" page. Make any connections? Work space brought to you by! notebook_paper.jpg