-----Original Message-----
From: Dennis E. Hamilton [mailto:infonuovo@email.com]
Sent: Tuesday, December 12, 2000 16:29
To: extende-dev@lists.sourceforge.net; Mark Szpakowski
Cc: unrev-II@egroups.com; Jim Hurd
Subject: RE: [eXtenDE-dev] Re: [unrev-II] Tech Startup "How To" notes
A tetrahedron is a solid figure having 4 faces, each being a triangle. It
has four vertices.
Notice that pyramids are not tetrahedrons, because the base is a square and
the remaining faces are triangles. To visualize a tetrahedron, think of a
pyramid-like object built on a triangular base. So there are only 3
vertical faces, coming together at a single apex.
A regular tetrahedron (with each edge the same length) is the simplest
regular solid. (We don't count the sphere, which can be thought of as an
infinitely-faced object in the limit.)
-- orcmid
-----Original Message-----
From: extende-dev-admin@lists.sourceforge.net
[mailto:extende-dev-admin@lists.sourceforge.net]On Behalf Of Eric
Armstrong
Sent: Tuesday, December 12, 2000 14:41
To: Mark Szpakowski
Cc: unrev-II@egroups.com; Jim Hurd; extende-dev@lists.sourceforge.net
Subject: [eXtenDE-dev] Re: [unrev-II] Tech Startup "How To" notes
Mark Szpakowski wrote:
>
> Shades of Buckminster Fuller's "conceptual tetrahedron"!
>
> However, how is a five pointed figure a tetrahedron, as in the
> structure with "purpose" at
> http://www.treelight.com/startup/TetrahedralModel.html?
>
Actually, I didn't have any references handy that I could
use to make sure I understood what a tetrahedron looks like.
I *think* what I drew is one, but there is a distinct
possibility I'm wrong.
What is a tetrahedron, if what I drew isn't one?
And what the heck did a draw, if it isn't a tetrahedron?
You're right that it is a 5-pointed figure.
I suppose I could call it the "diamond model".
But being a big fan of Bucky, I really like "tetrahedron".
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