Albrecht Dürer's Pentagon of 1525

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This Demonstration shows a pentagon constructed using a straight edge and compass given the length of one side. The construction uses five circles, each with radius . All five sides are equal but the pentagon is not regular.

Contributed by: Ralph Leon (March 2011)
Open content licensed under CC BY-NC-SA


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For more information, see A. Dürer, Approximate Construction of Regular Pentagon, cut-the-knot.org.



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