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Albrecht Dürer's Heptagon of 1525
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
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For more information, see A. Dürer,
Underweysung der Messing mit dem Zirckel und Richtscheyt
(
Treatise on Mensuration with Compass and Ruler
), 1525.
RELATED LINKS
Heptagon
(
Wolfram
MathWorld
)
Geometric Construction
(
Wolfram
MathWorld
)
PERMANENT CITATION
Ralf Schaper
"
Albrecht Dürer's Heptagon of 1525
"
http://demonstrations.wolfram.com/AlbrechtDurersHeptagonOf1525/
Wolfram Demonstrations Project
Published: March 7, 2011
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Plane Geometry
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Related Curriculum Standards
US Common Core State Standards, Mathematics
HSG-CO.D.12
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