Preview
Date
1970-2000
Description
Used with “Geo-Proof Set (Tetrahedra and Octahedra)” (LM.0215) to illustrate the volume ratio of octahedral and tetrahedra with the same edge lengths. Therodyne Corporation marketing material states: “Assemble a large tetrahedron by surrounding the octahedron with four tetrahedra. Let the volume of one of the tetrahedra be represented by VT and that of the octahedron by VO. Since the volume of the tetrahedron is proportional to the cube of its edge length, the volume of the large tetrahedron is eight times that of the small tetrahedron, or 8 VT = 4 VT + VO And, therefor, VO = 4 VT"
Also described in Moduledra Crystal Modules. A Teaching and Research Aid in Solid-State Physics. ". 1 March 1963; 31 (3): 190–196. https://doi.org/10.1119/1.1969350
Object Number
TM.0269
Box Number
07
Material
plastic
Dimensions
12.7 x 15.2 x 13.3 cm (5 x 6 x 5 1/4 inches)
Keywords
Arthur Loeb Design Science Teaching Collection, geometric models