> > Some may enjoy this, using PovRay CSG to illustrate answers
> > to geometric problems.
> >    http://astronomy.swin.edu.au/~pbourke/geometry/toruscut/
> > Before you look ask yourself, 
> >    How many ways can a torus be cut (with a single plane) 
> >    so that the resulting cross sections are perfect circles?
> Nice, but the really interesting question is how you can proove that 
> these three ways are the only ones...

Fortunate for me I wasn't trying to prove it.

-- 
Paul Bourke
pdb_NOSPAMswin.edu.au

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