Geometric Model by A. Harry Wheeler, One-Sided Polyhedron
name: label: maker
content: Wheeler, Albert Harry
notes: label: Description
content: The top and bottom of this cut and glued plastic model are pentagonal facets with equilateral triangles as sides. The edges forming the pentagons are parallel but of very different length. The apexes of the top and bottom facet triangles meet at a point inside the model, with each small equilateral triangle coplanar with a larger one. The model also has five congruent figures on the outside that face downward, with apexes that are vertices of the bottom pentagon. A paper tag reads: 714. Wheeler also assigned this model the number M73. He reported that it had ten vertices €, thirty edges (k), and twenty-one faces (f) for an Euler characteristic of e – k + f = 1.
label: Description
content: Reference:
label: Description
content: A.H. Wheeler, <I>Catalog of Models</I>, A. H. Wheeler Papers, Mathematics Collections, National Museum of American History.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Worcester
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 Helen M. Wheeler
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.304723.417
label: accession number
content: 304723
label: catalog number
content: 304723.417
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: green (overall color)
label: Physical Description
content: cut and glued (overall production method/technique)
label: Measurements
content: average spatial: 10 cm x 16.5 cm x 16 cm; 3 15/16 in x 6 1/2 in x 6 5/16 in