Question

find the surface area and volume of a regular tetrahedron with 2 in edges
help

Answer 1

As all faces are equal, then, find the surface of one of them.
\[S=2\times l=2\sqrt{3}\ in^2\]
Then,
\[S_{total}=4\times2\sqrt{3}=8\sqrt{3}\ in^2\]
For the volume,
\[V=\frac{1}{3}Sh=\frac{1}{3}2\sqrt{3}\frac{2\sqrt{6}}{3}=\frac{4\sqrt{2}}{3}\ in^3\]

Answer 2

yeah i was reallli confused about it before it wasnt addin up for me before thank u :)
and one more thing i cant simplify t further wen i do the square roots i get weird answers