11284
EXPLORE
LATEST
ABOUT
AUTHORING AREA
PARTICIPATE
Your browser does not support JavaScript or it may be disabled!
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
SNAPSHOTS
DETAILS
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
Share:
Embed Interactive Demonstration
New!
Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site.
More details »
Download Demonstration as CDF »
Download Author Code »
(preview »)
Files require
Wolfram
CDF Player
or
Mathematica
.
Related Demonstrations
More by Author
Albrecht Dürer's Heptagon of 1525
Ralf Schaper
Theobald's Nonagon-to-Triangle Dissection
Izidor Hafner
Four Visual Proofs of a Theorem about a Regular Nonagon
Izidor Hafner
Kürschák's Dodecagon
Sándor Kabai and Ferenc Holló Szabó
Albrecht Dürer's Pentagon of 1525
Ralph Leon
Roulette (Hypotrochogon) of a Polygon Rolling inside a Circle
Erik Mahieu
Constructing a Rectangle with the Same Area as a Pentagon
Izidor Hafner
Tarski's Adaptation of Wojtowicz's Argument on Optimal Dissection of a Unit Square
Izidor Hafner
Roulette (Hypotrochogon) of a Circle Rolling inside a Regular Polygon
Erik Mahieu
Dissection and Reassembly of Parallelogram of Given Base and Altitude
Izidor Hafner
Related Topics
Plane Geometry
Polygons
Browse all topics
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to
Mathematica Player 7EX
I already have
Mathematica Player
or
Mathematica 7+