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Re: Sum of interior angels of a 4point 8sided star
Posted:
Nov 11, 2008 2:14 PM


Just to say that a little differently,
the four "internal" vertices form a square with the sum of angles equal 360. Cutting the square off leaves four isosceles triangles with the angle sum of 4×180 = 720. So the total comes to 360 + 720 = 1080.
A. Bogomolny http://www.cuttheknot.org



