Talk:Regular tetrahedron

	Mathematics portal This article is within the scope of WikiProject Mathematics, a collaborative effort to improve the coverage of mathematics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.MathematicsWikipedia:WikiProject MathematicsTemplate:WikiProject Mathematicsmathematics
???	This article has not yet received a rating on the project's priority scale.

Polyhedra

	This article is within the scope of WikiProject Polyhedra, a collaborative effort to improve the coverage of polygons, polyhedra, and other polytopes on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PolyhedraWikipedia:WikiProject PolyhedraTemplate:WikiProject PolyhedraPolyhedra
???	This article has not yet received a rating on the project's importance scale.

Information missing from here that's in the 'Tetrahedron' article

Tetrahedron includes some construction details that would be helpful here. I'd do it myself, but I'm not sure where the right place to put it would be.

Particularly, the Regular Tetrahedron having a central angle of arccos(−⁠1/3⁠) is the most obvious construction method for me. There's a reference in the article, but I also found this simple and handy proof: The Tetrahedron and 109.5 Degrees scruss (talk) 21:47, 2 September 2025 (UTC)[reply]

Umm ... we already have explained its central angle in the application section, particularly in chemistry. Dedhert.Jr (talk) 05:11, 3 September 2025 (UTC)[reply]