Regular+hexahedron
91octahedron — A polyhedron with eight triangular faces. The sides of a right octahedron are identical isosceles triangles. The regular octahedron is one of the five Platonic solids (along with the tetrahedron, hexahedron (cube), dodecahedron, and… …
92tetrahedron — A polyhedron with four two dimensional faces, six edges, and six vertices. It is the simplest of all polyhedrons, and is a type of pyramid. The sides of a right tetrahedron are identical equilateral triangles. The regular tetrahedron is one of …
93platonic solid — /plətɒnɪk ˈsɒləd/ (say pluhtonik soluhd) noun any one of the five regular polyhedrons (tetrahedron, hexahedron, octahedron, dodecahedron, icosahedron) …
