Drafting Triangle
Drafting Triangle
- Description
- This 7-1/2" 30°-60°-90° triangle has a beveled hypotenuse and a 9/16" round hole at the center for positioning and holding the instrument. Compare to 304826.137 and 335331. See also 1983.0238.01 and 1979.0876.01. The triangle was found in the Physical Sciences collections in 1979 with objects that suggest an association with Cleveland Abbe (1838–1916), an American engineer, astronomer, and meteorologist who worked for the U.S. Weather Service from 1871 until shortly before his death.
- Reference: accession file.
- Location
- Currently not on view
- date made
- late 19th century
- Physical Description
- wood (overall material)
- Measurements
- overall: 11 cm x 19 cm x .2 cm; 4 11/32 in x 7 15/32 in x 3/32 in
- ID Number
- 1979.0876.02
- catalog number
- 1979.0876.02
- accession number
- 1979.0876
- subject
- Mathematics
- Drawing Instruments
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Squares and Triangles
- Data Source
- National Museum of American History
