A regular tetrahedron has a surface area of . Each face of the tetrahedron has a height of . What is the length of the base of one of the faces?

What is the length of an edge of a regular tetrahedron if its surface area is 156?

The volume of a regular tetrahedron is 94.8. What is the measurement of one of its edges?

What is the length of a regular tetrahedron if one face has an area of 43.3 squared units and a slant height of ?

A tetrahedron has a volume that is twice the surface area times the edge. What is the length of the edge? (In the answer choices, represents edge.)