A regular tetrahedron is a tetrahedron in which all four faces are equilateral triangles. It is one of the five regular Platonic solids, which have been known since antiquity.

Triangle side length: a

Height: h

Area of base: S

_{B}

Total Surface Area: S

Volume: V

- $h=√{2/3}\ a $
- $S_B=√3/4\ a^2$
- $S=√3\ a^2 $
- $V=1/3S_B\ h=a^3/{6√2}$

No Comments »