Rectangle Transformable Into an Obtuse Triangle, Probably a Ross Surface Form

Description
This is apparently is one in a series of models of plane figures (surface forms) designed by William Wallace Ross, a school superintendent and mathematics teacher in Fremont, Ohio. The three doweled pieces of this unpainted wooden model can be arranged either as a rectangle or as an obtuse-angled triangle.
Compare models 1985.0112.190 through 1985.0112.202. For further information about Ross models, including references, see 1985.0112.191.
Location
Currently not on view
Object Name
geometric model
geometric model
date made
ca 1895
maker
Ross, W. W.
Physical Description
wood (overall material)
Measurements
overall: 1 cm x 18.4 cm x 10 cm; 13/32 in x 7 1/4 in x 3 15/16 in
place made
United States: Ohio, Fremont
ID Number
1985.0112.195
accession number
1985.0112
catalog number
1985.0112.195
subject
Mathematics
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Arithmetic Teaching
Data Source
National Museum of American History, Kenneth E. Behring Center

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