The regular icosahedron is a convex polyhedron that can be constructed from a pentagonal antiprism by attaching two pentagonal pyramids with regular faces to each of its pentagonal faces, or by puttin
A twenty-sided die from Ptolemaic Egypt, inscribed with Greek letters on the faces
The Scattergories twenty-sided die, excluding the six letters Q, U, V, X, Y, and Z
The radiolarian Circogonia icosahedra
The Archimedean solids are a set of thirteen convex polyhedra whose faces are regular polygons and are vertex-transitive, although they are not face-transitive. The solids were named after Archimedes,
The Archimedean solids. Two of them are chiral, with both forms shown, making 15 models in all.
Truncated icosahedron in De quinque corporibus regularibus
Rhombicuboctahedron drawn by Leonardo da Vinci
Cuboctahedron in Perspectiva Corporum Regularium