Exterior Angles of Polygons

Use this construction to investigate the sum of the exterior angles of a polygons.

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1. Use the slider to resize the pentagon. What is the sum of the exterior angles of a pentagon?
2. Use the red point on the pentagon to change the angle measures. Now use the slider to resize the pentagon. Does changing the angle measures effect the sum of the exterior anlges?

Barbara Perez, 10/1/06, Created with GeoGebra