Object Details
- Baker, Richard P.
- Description
- 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.”
- The model sold for $2.50.
- References:
- R. P. Baker, Mathematical Models, Iowa City, Iowa, 1931, p. 11.
- Richard P. Baker Papers, University Archives, University of Iowa, Iowa City, Iowa.
- Location
- Currently not on view
- Credit Line
- Gift of Frances E. Baker
- ca 1906-1935
- ID Number
- MA.211257.020
- accession number
- 211257
- catalog number
- 211257.020
- Object Name
- geometric model
- Physical Description
- metal (overall material)
- white (overall color)
- soldered (overall production method/technique)
- Measurements
- 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
- place made
- Iraq
- United States: Iowa, Iowa
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- National Museum of American History
- Subject
- Mathematics
- Record ID
- nmah_1080279
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746a9-2065-704b-e053-15f76fa0b4fa
