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Since Plato’s work, two other classes of equilateral convex polyhedra, as the collective of these shapes are called, have been found: Archimedean solids (including truncated icosahedron) and ...
ABHISHEK BHATTACHARYA, DAVID B. DUNSON, Nonparametric Bayesian density estimation on manifolds with applications to planar shapes, Biometrika, Vol. 97, No. 4 (DECEMBER 2010), pp. 851-865 ...
Platonic solids, the first class of such shapes, are well known. They consist of five different shapes: tetrahedron, cube, octahedron, dodecahedron and icosahedron.