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Platonic Solids

Categories: Math
Added: Sat Oct 11 06:19:16 +0000 2003Views: 18,400
Rating: 3.27 (11 votes)
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The number of sides of the 5 regular solids, also known as the Platonic Solids, are 4, 6, 8, 12, and 20. A regular solid is a one whose facets are all congruent to one another and are either a right triangle, a square, or a regular pentagon. Euclid proved over 2000 years ago that only 5 such solids exist. They are tetrahedron (4 sides), cube (6 sides), octahedron (8 sides), dodecahedron (12 sides), and icosahedron (20 sides).


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