Geometric Model by A. Harry Wheeler, Two Trihedral Angles
date: label: date made
content: ca 1945
name: label: Maker
content: A. Harry Wheeler
notes: label: Description
content: In this plastic model, a transparent tetrahedron has isosceles triangles for side faces. Inside it is a white triangle with one edge on the base and two on other faces. A paper tag on the model reads: 2TRIA. Another tag reads: A. Harry Wheeler.
label: Description
content: George Wentworth used two such figures in a theorem defining two equal trihedral angles in terms of the face angles on the faces surrounding the trihedral angle.
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
creditLine: label: Credit Line
content: Gift of Louise D. Campbell
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1979.0102.206
label: accession number
content: 1979.0102
label: catalog number
content: 1979.0102.206
objectType: label: Object Name
content: Geometric Model
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 6.7 cm x 7.5 cm x 4.5 cm; 2 5/8 in x 2 15/16 in x 1 25/32 in