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|  | | Platonic solids
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|  | | |  The volumes of the tetrahedron, cube, octahedron, dodecahedron and icosahedron are calculated by known formulae.
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| | |  The Platonic solids are the only five solids in which all faces are identical regular polygons, interchangable by symmetry operations. | | ||||||
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© Andy & Steve Shipway 2008