Octahedron

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Octahedron 1.JPG
Octahedron 3.JPG
Octahedron 6.JPG
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One of the five regular solids : regular tetrahedron, octahedron, cube, icosahedron, dodecahedron.

References : Plato, Euclid,...

See also :

cubic symmetry - tetrahedral symmetry - icosahedron

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