Albrecht Dürer's Pentagon of 1525

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.

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DETAILS

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

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Related Curriculum Standards

US Common Core State Standards, Mathematics