Wolfram Demonstrations Project

This Demonstration shows a heptagon constructed in six easy steps using a straight edge and compass.

The heptagon is not regular. For example, one angle at the midpoint is ≈ 51° 19' instead of 360° / 7 ≈ 51° 26'.

Contributed by: Ralf Schaper

For more information, see A. Dürer, Underweysung der Messing mit dem Zirckel und Richtscheyt (Treatise on Mensuration with Compass and Ruler), 1525.

Heptagon (Wolfram MathWorld)

Geometric Construction (Wolfram MathWorld)

Ralf Schaper

"Albrecht Dürer's Heptagon of 1525"
http://demonstrations.wolfram.com/AlbrechtDurersHeptagonOf1525/
Wolfram Demonstrations Project
Published: March 7, 2011

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Albrecht Dürer's Heptagon of 1525

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