RE: [eXtenDE-dev] Re: [unrev-II] Tech Startup "How To" notes

From: Dennis E. Hamilton (
Date: Wed Dec 13 2000 - 08:09:23 PST

  • Next message: Eric Armstrong: "Re: [eXtenDE-dev] Re: [unrev-II] Tech Startup "How To" notes"

    -----Original Message-----
    From: Dennis E. Hamilton []
    Sent: Tuesday, December 12, 2000 16:29
    To:; Mark Szpakowski
    Cc:; 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-----
    []On Behalf Of Eric
    Sent: Tuesday, December 12, 2000 14:41
    To: Mark Szpakowski
    Cc:; Jim Hurd;
    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
    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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