Dissection of a Parallelogram into Triangles, Ross Surface Form #10
Object Details
- date made
- ca 1895
- maker
- Ross, W. W.
- Description
- This is the tenth 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 unpainted wooden rhomboid (parallelogram) is bisected along a diagonal into two scalene triangles. Two adjacent sides on the left are equal, as are two adjacent sides on the right. A paper label attached to the model reads: Rhomboid B 4x6 Bisected. According to Ross, the model shows that if a rhomboid is cut diagonally through the obtuse angles, two equal scalene triangles result.
- Compare models 1985.0112.190 through 1985.0112.202. For further information about Ross models, including references, see 1985.0112.190.
- 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
- Credit Line
- Gift of Wesleyan University
- Data Source
- National Museum of American History
- ID Number
- 1985.0112.198
- catalog number
- 1985.0112.198
- accession number
- 1985.0112
- Object Name
- geometric model
- Physical Description
- wood (overall material)
- Measurements
- overall: 1 cm x 17.2 cm x 10 cm; 13/32 in x 6 25/32 in x 3 15/16 in
- Record ID
- nmah_694075