Model of a Twisted Polygon by Richard P. Baker, Baker #133
date: label: date made
content: ca 1906-1935
name: label: maker
content: Baker, Richard P.
notes: label: Description
content: A twisted polygon is a closed broken line whose sides do not all lie in the same plane. This model shows a few sides of such a polygon, namely the edges ABCDE. All lie on a double cone, which also is shown. The sides BC and CD lie in one plane, which is represented by a large circle that intersects the cone. The sides CD and DE lie in a second plane, represented by another large circle. The sides AB and BC lie in a third plane, represented by a quadrilateral tangent to the cone. A plane perpendicular to CD at its midpoint also is represented by a circular wedge. Baker described this model as showing “osculating planes and cone with center of spherical curvature.”
label: Description
content: The model sold for $2.50.
label: Description
content: References:
label: Description
content: R. P. Baker, <I>Mathematical Models</I>, Iowa City, Iowa, 1931, p. 11.
label: Description
content: Richard P. Baker Papers, University Archives, University of Iowa, Iowa City, Iowa.
label: Location
content: Currently not on view
place: label: place made
content: Iraq
label: place made
content: United States: Iowa, Iowa
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 Frances E. Baker
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.211257.020
label: accession number
content: 211257
label: catalog number
content: 211257.020
objectType: label: Object Name
content: geometric model
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: white (overall color)
label: Physical Description
content: soldered (overall production method/technique)
label: Measurements
content: average spatial: 17.8 cm x 21.6 cm x 13.8 cm; 7 in x 8 1/2 in x 5 7/16 in