Geometric Model by A. Harry Wheeler, Supplementary Trihedral Angles
Geometric Model by A. Harry Wheeler, Supplementary Trihedral Angles
- 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
- date made
- 1927 05 29
- 1927
- associated dates
- 1927 05 29 / 1927 05 29
- unspecified
- Wheeler, Albert Harry
- maker
- Wheeler, Albert Harry
- place made
- United States: Massachusetts, Worcester
- associated place
- United States: Massachusetts, Worcester
- 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
- ID Number
- MA.304723.195
- accession number
- 304723
- catalog number
- 304723.195
- Credit Line
- Gift of Helen M. Wheeler
- subject
- Mathematics
- See more items in
- Medicine and Science: Mathematics
- Science & Mathematics
- Trigonometry
- Spherical Trigonometry
- Data Source
- National Museum of American History
