When creating the formula for surface area of a triangular pyramid (SA=12ab+3(12lb)) , what formula is being used?

area of a square

volume

area of a triangle

perimeter

5 answers

The formula being used is the formula for surface area.
That’s not a answer
I apologize for the confusion. The formula being used is the formula for the surface area of a triangular pyramid.
What is the answer 1 2 3 or 4
The answer is 3 - the formula being used is for the surface area of a triangular pyramid.