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clipka <ano### [at] anonymous org> wrote:
> Swapping the 1's and Phi's in the TwentyHedron definition gives a nice
> regular icosahedron.
From : https://en.wikipedia.org/wiki/Regular_icosahedron
The vertices of an icosahedron with edge-length 2, centered at the origin, are
where ϕ = (1 + √5) / 2 is the golden ratio (also written τ).
Note that these vertices form five sets of three concentric, mutually orthogonal
golden rectangles, whose edges form Borromean rings.
But I tend to be able to misread things rather well. ;)
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