The Tetrahedron is a kind of pyramid for which the volume can be calculated by the following expression:
[tex]V=\frac{1}{3}\cdot B\cdot h[/tex]Where V is the volume, B is the area of the base and h is the height. Using the data from the problem we have:
[tex]V=\frac{1}{3}\cdot0.433\cdot0.816=0.117\text{ cubic feet}[/tex]The volume of the Tetrahedron is 0.117 cubic feet.