#1**+1 **

"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