Object Details
- Wheeler, Albert Harry
- Description
- Three planes that meet at the center of a sphere form what is called a trihedral (three-sided) angle. Each plane intersects the sphere in a great circle. Segments of these three circles form a spherical triangle on the sphere. In this cut and folded tan paper model, Wheeler labels the vertices of this triangle ABC. Consider a point (not named by Wheeler – call it X) inside the bounds of the trihedral angle and drop perpendiculars to the three sides of the trihedral angle through it. Wheeler calls the points of intersection D, E, and F. The trihedral angle centered at X is the supplement of the original trihedral angle.
- Reference:
- D. A. Low, Practical Geometry and Graphics, New York: Longmans, Green and Co., 1912, pp. 233-235.
- Location
- Currently not on view
- Credit Line
- Gift of Helen M. Wheeler
- 1927 05 29
- ID Number
- MA.304723.195
- accession number
- 304723
- catalog number
- 304723.195
- Object Name
- Geometric Model
- Physical Description
- paper (overall material)
- tan (overall color)
- cut and folded (overall production method/technique)
- Measurements
- average spatial: 7 cm x 7.3 cm x 6 cm; 2 3/4 in x 2 7/8 in x 2 3/8 in
- place made
- United States: Massachusetts, Worcester
- See more items in
- Medicine and Science: Mathematics
- Trigonometry
- Science & Mathematics
- Spherical Trigonometry
- National Museum of American History
- Subject
- Mathematics
- Record ID
- nmah_1066700
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746a9-2734-704b-e053-15f76fa0b4fa
