Polyhedron

Some polyhedra Dodecahedron (Regular polyhedron) Small stellated dodecahedron (Regular star) Icosidodecahedron (Uniform) Great cubicuboctahedron (Uniform star) Rhombic triacontahedron (Uniform dual) Elongated pentagonal cupola (Convex regular-faced) Octagonal prism (Uniform prism) Square antiprism (Uniform antiprism)

A polyhedron (polyhedra or polyhedrons if more than one) is a geometrical shape. It is a 3D shape with flat faces, and straight edges. Each face is a polygon surrounded by edges. Usually it is known by the number of faces, corners, or edges it has.

There are many groups of polyhedra, which can either be only a small set, or can be infinite. Prisms, pyramids, antiprisms, and bipyramids are groups of polyhedra.

A regular polyhedron has faces that are all the same, corners that are all the same, and edges that are all the same. A uniform polyhedron can have one or two kinds of its parts be all the same.