When creating the formula for surface area of a triangular pyramid (SA=12ab+3(12lb))

, what formula is being used?(1 point)
Responses

perimeter
perimeter

volume
volume

area of a triangle
area of a triangle

area of a square

1 answer

The formula for the surface area of a triangular pyramid (SA = 1/2ab + 3(1/2lb)) involves calculating the area of the triangular base and the area of the three triangular faces. Therefore, the formula being used is:

area of a triangle