Geometric Model by A. Harry Wheeler, Square Transformable into Two Squares, Portion, Plane Dissection
date: label: date made
content: ca 1932
name: label: maker
content: Wheeler, Albert Harry
notes: label: Description
content: The four pieces of this hinged dissection may be arranged as a square or as a square ring with a square hole. With a square, it becomes Wheeler's model 5SA, and a partially hinged dissection.
label: Description
content: This is a demonstration of the Pythagorean Theorem. This is Wheeler's model 5SA. It follows a model of Henry Perigal. A drawing for this model, dated April 7, 1932, is in 1979.3002.43, folder 1. Perigal did not present this as a hinged dissection, Wheeler did. Greg N. Frederickson comments that in the 1980s, David Singmaster noted that the model was hingeable and constructed a hinged version.
label: Description
content: References:
label: Description
content: W. W. R. Ball, <I>Mathematical Recreations and Essays</I>, p. 88.
label: Description
content: Greg N. Ferguson, <I>Hinged Dissections: Swinging & Twisting</I>, Cambridge: Cambridge University Press, 2002, pp. 33-34.
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
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content: Plane Dissections
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.304723.774
label: accession number
content: 304723
label: catalog number
content: 304723.774
objectType: label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: wood (overall material)
label: Physical Description
content: metal (overall material)
label: Physical Description
content: red (overall color)
label: Physical Description
content: hinged (overall production method/technique)
label: Measurements
content: average spatial: 1.5 cm x 9 cm x 9 cm; 19/32 in x 3 17/32 in x 3 17/32 in