Edit made on December 03, 2009 by GarethMcCaughan at 21:24:16
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[[[< IMG:Dodecahedron.svg.png ]]]
The regular Dodecahedron has twelve faces, each one a pentagon.
It is one of the platonic solids.
If you join the centres of adjacent faces you get an icosahedron.
That's hard to visualise - pictures to follow.
You can make a paper dodecahedron, or another paper dodecahedron.