Definition:Regular Tetrahedron/Historical Note
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Historical Note on the Regular Tetrahedron
The concept of a regular tetrahedron is not mentioned explicitly by Euclid in The Elements.
The first reference to it is in Proposition $13$ of Book $\text{XIII} $: Construction of Regular Tetrahedron within Given Sphere:
In the words of Euclid:
- To construct a pyramid, to comprehend it in a given sphere, and to prove that the square on the diameter of the sphere is one and a half times the square on the side of the pyramid.
(The Elements: Book $\text{XIII}$: Proposition $13$)
According to the Pythagorean tradition, the regular tetrahedron was the symbol for the element fire.
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $4$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $4$