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A '''tetrahedron''' is a [[Pyramid|pyramidal]] [[polygon]] structure in which the base is surmounted by three triangular sides which meet at a common apex.
==Geometry==
The volume of a triangular-based pyramid:
:<math>V= \frac{1}{3}Bh</math>
'''''V''''' is the overall volume of a pyramid. '''''B''''' equals the area of the base, and '''''h''''' is the perpendicular height.<ref>[https://www.varsitytutors.com/advanced_geometry-help/how-to-find-the-volume-of-a-tetrahedron How To Find The Volume Of A Tetrahedron - Advanced Geometry -Varsity Tutor (varsitytutors.com)]</ref><ref>[http://www.math.com/tables/geometry/volumes.htm Volume formulas]</ref><ref>[http://www.mathsisfun.com/geometry/tetrahedron.html Tetrahedron (mathisfun.com)]</ref>
==Trinitarian analogy==
The tetrahedron can be used to illustrate the unity of the [[Trinity]].
==References==
{{Reflist}}
[[Category:Geometry]]