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Topic: Sum of interior angels of a 4-point 8-sided star
Replies: 2   Last Post: Nov 11, 2008 2:14 PM

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Alexander Bogomolny

Posts: 406
Registered: 12/4/04
Re: Sum of interior angels of a 4-point 8-sided star
Posted: Nov 11, 2008 2:14 PM
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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

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