Geometric Model by A. Harry Wheeler, One-Sided Polyhedron
name: label: maker
content: Wheeler, Albert Harry
notes: label: Description
content: This pink plastic model has an equilateral triangle for a base and three triangles on the sides that meet in a point. A thin pyramid with a quadrilateral base is attached to each side edge of this larger triangular pyramid. One edge of each thin pyramids coincides with an edge of the larger triangular pyramid. One short edges from each pyramid meets another thin pyramid at the top of the model. Many sides are coplanar. The entire model has white plastic threads around it. A mark on the bottom reads: 651.
label: Description
content: According to Wheeler’s catalog, model 651 has ten vertices (e=10), eighteen edges (k=18), and nine faces, (f = 9) for an Euler characteristic of e – k + f = 1.
label: Description
content: Models MA.304723.378 and MA.304723.362 have the same shape. Models MA.304723.377 and MA.304723.401 have the same shape. Models MA.304723.378 and MA.304723.401 are both marked 650. Models MA.304723.377 and MA.304723.362 are both marked 651.
label: Description
content: Reference:
label: Description
content: A.H. Wheeler, "List of Models," Mathematics Collections, Non-accession number 1979.3002.83, NMAH.
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.304723.377
label: accession number
content: 304723
label: catalog number
content: 304723.377
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: pink, speckled (overall color)
label: Physical Description
content: cut and glued (overall production method/technique)
label: Measurements
content: average spatial: 4 cm x 6.5 cm x 5.9 cm; 1 9/16 in x 2 9/16 in x 2 5/16 in