Talk:Bipyramid

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 Field:  Geometry


Architecture of a bipyramid[edit]

An architecture of a complex pyramids

Complex of the pyramids constructed of glass, metal, stone, ceramics, tree, amber and other materials

The information on architecture and details of a complex pyramids has been received by means of a framework dowsing and channelling. In work materials results of researches in the field of alternative medicine where it is revealed are in more details stated, that the architecture of pyramids can is applied in the medical purposes. In this work it is shown, how the physical form of a matter influences movement of the radio form of a matter (the Spirit substance). And all it is carried out by means of architecture of making components of a pyramid. In work photos of development of architecture of a complex of pyramids are presented[1].

Bipyramid (Magic Staff)[edit]

Magic staff (Bipyramid)

The basic materials of which the staff is made: aluminium, copper, iron, zinc, a brass, cupronickel, quartz, glass, lazurite, a nephrite, a jasper, corals, turquoise, amber, a cedar. —Preceding unsigned comment added by Shatilov Konstantin (talkcontribs) 18:08, 26 December 2007 (UTC)

Architecture of a bipyramid in the Temples[edit]

[[2]] —Preceding unsigned comment added by 91.122.151.50 (talk) 10:49, 26 December 2007 (UTC)

--Shatilov Konstantin 12:10, 14 September 2007 (UTC)


What are these called? Skew bipyramids?[edit]

Take a bipyramid, cut it in two along its equator, and rotate one of the halves so that its vertices alternate, around the equator, with the vertices of the other half. Take the convex hull of the result. It has kite-shaped faces, and is face-transitive. What is it called? I think it is regular enough to deserve an article. Or maybe it has an article already, which should be linked to from this one. Maproom (talk) 12:20, 15 October 2012 (UTC)

If the original is an n-bipyramid, seems to me you have a 2n-bipyramid. —Tamfang (talk) 19:13, 15 October 2012 (UTC)
Yes, of course you do. Stupid of me. What I should have said is, as well as rotating one half, separate the two halves by exactly enough that the faces of the convex hull are four-sided, kites in fact. (For the special case of the triangular bipyramid, the kites are squares, and the result is a cube.) Maproom (talk) 19:31, 15 October 2012 (UTC)
It's the dual of an antiprism and it is called ... (clickety click) ... a trapezohedron, among other names. —Tamfang (talk) 19:56, 15 October 2012 (UTC)
Thank you! Maproom (talk) 22:28, 15 October 2012 (UTC)