Tuesday, April 26, 2011

Thursday, April 14, 2011

A polyhedron constructed by folding along the edges of a Spidron - a figure in the plane made up of two alternating sequences of isosceles triangles.

Sunday, April 10, 2011

A strange attractor by Nathan Selikoff resembling the Eagle Nebula.
Part of a tessellation of the plane generated using Möbius transforms. By Doug Hensley.
Some examples of Chladni patterns
A rhombic triacontahedron and its net
This is a Klein diagram by Francisco Lara-Dammer that represents A5, the group of symmetries of the icosahedron.
A strange attractor by Nathan Selikoff.
Impossible Geometry by Jos Leys
A pattern showing the result of six levels of recursion using the "inflation rules" of Penrose tiles. By L. Kerry Mitchell.

Thursday, April 7, 2011

Kürschák's Dodecagon
A visual proof by Kürschák that a regular 12-sided polygon inscribed in the unit circle has area 3. This means that estimating π to be 3 is like saying a circle is a Dodecagon.