Icosahedron,

icosahedron's Usage Examples:

In geometry, the tridiminished icosahedron is one of the Johnson solids (J63).

In geometry, the triakis icosahedron (or kisicosahedron) is an Archimedean dual solid, or a Catalan solid.

truncation of the Platonic solids: truncated tetrahedron, truncated octahedron, truncated cube, truncated dodecahedron, and truncated icosahedron, and included.

octahedrons, dodecahedrons, icosahedrons, ), spheres, ellipsoids, paraboloids, hyperboloids, cylinders, cones.

icosahedron: The crossing edges in the dual compound are the diagonals of the rhombs.

Note the duality between the cube and the octahedron, and between the dodecahedron and the icosahedron.

In geometry, a regular icosahedron (/ˌaɪkɒsəˈhiːdrən, -kə-, -koʊ-/ or /aɪˌkɒsəˈhiːdrən/) is a convex polyhedron with 20 faces, 30 edges and 12 vertices.

perhaps only one has been found to be a true icosahedron, as opposed to a reinterpretation of the icosahedron dual, the dodecahedron.

The dual polyhedron is the regular icosahedron {3, 5}, having five equilateral triangles around each vertex.

are the vertices of a regular icosahedron.

In geometry, the metabidiminished icosahedron is one of the Johnson solids (J62).

(d8), dodecahedron (d12), and a icosahedron (d20)), one never needs to reroll any dice.

This icosahedron was excavated near Arloff in Germany and is currently on display in the Rheinisches Landesmuseum in Bonn.

Synonyms:

polyhedron,