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Mathematical Object

Truncated Icosahedron

Geometry

The truncated icosahedron is an Archimedean solid, one of thirteen convex polyhedra whose faces are two or more types of regular polygon arranged identically around every vertex, formed by cutting off, or truncating, the twelve vertices of a regular icosahedron. It has twelve regular pentagonal faces and twenty regular hexagonal faces, sixty vertices and ninety edges, with two hexagons and one pentagon meeting at each vertex. It is most widely known as the standard shape of the classic soccer ball design and, in a related form built from carbon atoms rather than flat polygons, as the shape of the buckminsterfullerene molecule, the carbon-60 fullerene discovered in 1985 and named for its resemblance to the geodesic domes of the architect Buckminster Fuller.

Facts
Classification
Object Kind
Geometric Object 1
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In Branch

Source Wikipedia: Truncated icosahedron

Is Kind Of Object

Entity-backed identity for the object-kind enum value this mathematical object already carries, resolved to a mathematics concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The object-kind fact itself stays on the object unchanged.

Sources
1. Wikipedia: Truncated icosahedron
  • Lead section
    In geometry, the truncated icosahedron is a polyhedron that can be constructed by truncating all of the regular icosahedron's vertices.
  • In Branch: Geometry, Lead sentence
    In geometry, the truncated icosahedron is a polyhedron that can be constructed by truncating all of the regular icosahedron's vert
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