About this artwork
Text printed on reverse of stereocard:
No. 43 – (34224) Geometry Unit – The Sphere
A sphere can be circumscribed about any given tetrahedron.
Corollary: Through four points not in the same plane one spherical surface, and only one, can be passed.
Corollary: The four perpendiculars erected at the centers of the faces of the tetrahedron meet at a point.
- Currently Off View
- Photography and Media
- Keystone View Co. (Publisher)
- New York City (Object made in)
- Gelatin silver print, stereo
- Each image: 7.8 × 7.6 cm (3 1/8 × 3 in.); Card: 8.8 × 17.8 cm (3 1/2 × 7 1/16 in.)
- Gift of Harold Allen