I'm trying to figure out what the formula is to find the surface area of a non-regular tetrahedron when given the vertices coordinates.
Example:
Vertex $A$: $[0, 0, 5]$
Vertex $B$: $[-1, -1, 0]$
Vertex $C$: $[1, 0, 0]$
Vertex $D$: $[0, 2, 0]$
Basically I want to turn this user input into surface area.
Thank you