#regular_polyhedron__regularpolyhedron__regular_convex_solid__regular_convex_polyhedron__Platonic_body__Platonic_solid__ideal_solid__idealsolid  any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent
  supertype:  #polyhedron  a solid figure bounded by plane polygons or faces
  subtype:  #regular_tetrahedron__regulartetrahedron  a tetrahedron with four equilateral triangular faces
  subtype:  #cube__regular_hexahedron__regularhexahedron  a hexahedron with six equal squares as faces
     subtype:  #quadrate.cube  a cubelike object
  subtype:  #regular_dodecahedron__regulardodecahedron  a dodecahedron with twelve regular pentagons as faces
  subtype:  #regular_octahedron__regularoctahedron  an octahedron with eight equilateral triangles as faces
  subtype:  #regular_icosahedron__regularicosahedron  an icosahedron with twenty equilateral triangles as faces

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