Sum of Exterior Angles of a Polygon Proof

| View Cart ⇗ | Info

Illustration used to prove “If the sides of any polygon are prolonged in succession one way, no two adjacent sides being prolonged through the same vertex, the sum of the exterior angles thus formed is four right angles.”


C.A. Hart, Daniel D. Feldman Plane and Solid Geometry (New York, NY: American Book Company, 1911)


TIFF (full resolution)

2400×1157, 146.1 KiB

Large GIF

1024×493, 18.2 KiB

Medium GIF

640×308, 10.5 KiB

Small GIF

320×154, 4.7 KiB