Geometric Model by A. Harry Wheeler, Trihedral Angles
name: label: maker
content: Wheeler, Albert Harry
notes: label: Description
content: In this cut and glued plastic model, a transparent tetrahedron (lacking a base) has equilateral triangles for side faces. Inside it is a white triangle with edges on two faces (and a third edge where the base would be). George Wentworth used two such figures in a diagram in a theorem defining two equal trihedral angles in terms of the face angles on the faces surrounding the trihedral angle. A tag on the model reads: 2TRIA. Another tag reads: A. Harry Wheeler.
label: Description
content: For a related pattern, dated February 2, 1945, see 1979.0102.109.
label: Description
content: Compare 1979.0102.206 and 1979.0102.207.
label: Description
content: Reference:
label: Description
content: George A. Wentworth (with David Eugene Smith), <I>Plane and Solid Geometry</I>, Boston: Ginn and Company, 1913, pp. 312-313.
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.304723.713
label: accession number
content: 304723
label: catalog number
content: 304723.713
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: white (overall color)
label: Physical Description
content: cut and glued (overall production method/technique)
label: Measurements
content: average spatial: 6.6 cm x 5.7 cm x 6.2 cm; 2 19/32 in x 2 1/4 in x 2 7/16 in