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# help!

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What is the formula for finding the area of a tetrahedron?

tertre  Feb 6, 2018
edited by tertre  Feb 6, 2018
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"Area" is an ambiguous term when referring to three-dimensional shapes. "Area" could refer to the following:

• Surface Area
• Area of a Face

For a regular tetrahedron, the surface area is as follows:

$$SA=a\sqrt{3}$$

The area of a face for a regular tetrahedron is as follows:

$$A_{\text{face}}=\frac{a^2\sqrt{3}}{4}$$

In both cases, "a" represents the length from one vertex to another.

TheXSquaredFactor  Feb 6, 2018