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The fifth and final regularpolyhedron is the dodecahedron, with 12 pentagonal faces.
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Well, Mr. Cornell, you may know that in the field of solid geometry there are only five possible regularpolyhedrons.
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On the regularpolyhedrons:
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And what shall we say of the infinite variety of those exquisite and regularpolyhedrons in which the world of crystals is so rich?
Usage of platonic solid in English
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Five Platonicsolids: tetrahedron, cube, octahedron, dodecahedron, icosahedron.
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Are not the five platonicsolids, of which Plato had so much to say, just various crystalline forms?
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It was a perfect evocation of the ghostly quality of "surgical" Cold War combat: We fight amongst Platonicsolids!
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The highlight of the 13th and final book of Euclid's Elements was the proof that there are just five " Platonicsolids".
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Suppose, for example, that we attempt to deal decoratively which such simple figures as the three lowest Platonicsolids-thetetrahedron, the hexahedron, and the octahedron.