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  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#1 2009-06-20 01:14:22

wintersolstice
Real Member
Registered: 2009-06-06
Posts: 114

"regular polyhedra"

In the "Mathsisfun" page, it says there are only 5 regular polyhedra ("the Platonic solids (or regular polyhedra)") 

There are actually nine regular polyhedra, the 5 Platonic solids and the 4 Kepler-Poinsot solids. A Platonic solid is a regular "convex" polyhedron. The other 4 are star polyhedra.


Why did the chicken cross the Mobius Band?
To get to the other ...um...!!!

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#2 2009-06-20 12:13:04

MathsIsFun
Administrator
Registered: 2005-01-21
Posts: 7,529

Re: "regular polyhedra"

You have a point. I will remove the reference to "regular" until I can incorporate the star polyhedra.


"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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