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Albrecht Dürer's Nonagon of 1525
This Demonstration shows a nonagon constructed in seven easy steps using straightedge and compass. The nonagon is not regular. For example, one angle at the midpoint is approximately 39° 35' instead of 40°.
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
).
RELATED LINKS
Nonagon
(
Wolfram
MathWorld
)
Geometric Construction
(
Wolfram
MathWorld
)
PERMANENT CITATION
Ralf Schaper
"
Albrecht Dürer's Nonagon of 1525
"
http://demonstrations.wolfram.com/AlbrechtDurersNonagonOf1525/
Wolfram Demonstrations Project
Published: March 7, 2009
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