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ShareA 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.
The tetrahedron is unique among the uniform polyhedra in possessing no parallel faces.
For more information about the topic Tetrahedron, read the full article at Wikipedia.org, or see the following related articles:
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