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Sum of interior angels of a 4-point 8-sided star

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puffathy

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Oct 22, 2008, 8:32:52 PM10/22/08
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The sum of the interior angles of a "perfect" 4-point 8-sided star is 1080 degrees.

perfect: 8 sides are equal

Can someone prove that 1080 degrees is the correct answer? Attached is a pixture: http://mathforum.org/kb/servlet/JiveServlet/download/125-1847790-6471995-532734/star.docx

I've tried, but my answer is insufficient.

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