¶ Tetrahedron
Cross Reference
Tetrahedron:
"The volume of a tetrahedron is one-third the base area times the altitude. Any arbitrary tetrahedron will have a volume equal to any other tetrahedron so long as they have common base areas and common altitudes.
“As the tetrahedron is pulled out from the cube the circumference around the tetrahedron remains equal when taken at the points where cube and tetrahedron edges cross, i.e., any rectangular plane taken through the regular tetrahedron will have a circumference equal to any other rectangular plane taken through the same tetrahedron and this circumference will be twice the length of the tetrahedron edge.”
1967
(See Illustration #20.)
¶ Citations
- SYNERGETIC ILLUSTRATIONS, caption 2(
