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


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 1985.0112.190.

Date Made: ca 1895

Maker: Ross, W. W.

Location: Currently not on view

Place Made: United States: Ohio, Fremont

Subject: Mathematics


See more items in: Medicine and Science: Mathematics, Science & Mathematics, Arithmetic Teaching


Exhibition Location:

Credit Line: Gift of Wesleyan University

Data Source: National Museum of American History

Id Number: 1985.0112.195Accession Number: 1985.0112Catalog Number: 1985.0112.195

Object Name: geometric modelgeometric model

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


Record Id: nmah_694072

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