Geometric Model, Truncated Icosahedron
date: label: date made
content: 1990s
name: label: maker
content: Benson, Harold Walter
notes: label: Description
content: Cutting off the vertices of a regular polyhedron creates another polyhedron which may also have faces that are regular polygons. If one cuts off the vertices of a regular twenty-sided icosahedron, one can produce this truncated icosahedron, which has twenty faces that are regular hexagons and twelve that are regular pentagons. The solid angles of the figure are equal, and it is called a semi-regular solid. The ancient Greek mathematician Archimedes enumerated the eighteen regular and semi-regular solids, and they are known as Archimedean solids in his honor. Only the skeleton of the solid is shown in this model. It fits on a wooden stand.
label: Description
content: Some hobbyists enjoy figuring out how to make attractive models of geometric surfaces that have long been known. Harold Walter Benson, a machinist from Chicago, made this model in the 1990s, when he was retired and living in South Carolina.
label: Location
content: Currently not on view
place: label: place made
content: United States: South Carolina, Clemson
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Katherine B. Benson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1999.0130.04
label: catalog number
content: 1999.0130.04
label: accession number
content: 1999.0130
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 18.5 cm x 17 cm x 17 cm; 7 9/32 in x 6 11/16 in x 6 11/16 in