Tetrahedron

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A tetrahedron (plural: tetrahedra) is a polyhedron composed of four triangular faces, three of which meet at each vertex. A regular tetrahedron is one in which the four triangles are regular, or "equilateral," and is one of the Platonic solids.

Image:tetrahedron.gif


In the Crop Circle Ship, the tetrahedron shape is used in the Large Tetrahedron Structure.


Image:tetrahedron2.gif

A tetrahedron can be folded from a single sheet of paper.

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