How to find the diagonal of a tetrahedron - Geometry

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Question

Given a regular tetrahedron with an edge of , what is the height (or diagonal)? The height is the line drawn from one vertex perpendicular to the opposite face.Tetrahedron_10

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Answer

The height of a regular tetrahedron can be derived from the formula

where is the length of one edge.

Therefore, plugging in the side length of ,

.

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