interesting... I also found a construction for a 17-gon

来源: 北京大老猫 于 2011-01-17 11:58:12 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (537 bytes)
回答: 正七边形的更高精度做法二种 由 蒲汇塘渔夫 于 2011-01-17 01:16:46

File:Regular Heptadecagon Inscribed in a Circle.gif

This is the exact construction for a heptadecagon. Interestingly, all constructible regular polygons with an odd number of sides are part of a particular sequence: they are multiples of the five known Fermat primes.

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