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Regular 4-polytope
Four-dimensional analogues of the regular polyhedra in three dimensions / From Wikipedia, the free encyclopedia
In mathematics, a regular 4-polytope or regular polychoron is a regular four-dimensional polytope. They are the four-dimensional analogues of the regular polyhedra in three dimensions and the regular polygons in two dimensions.
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There are six convex and ten star regular 4-polytopes, giving a total of sixteen.