Calculate the surface area of the square pyramid that has a base length of 12 and a slant height of 18. Show your work. short and simple pls
Surface area of a square pyramid = base area + (1/2 * perimeter of base * slant height)
Base area = (12)^2 = 144
Perimeter of base = 4 * 12 = 48
Surface area = 144 + (1/2 * 48 * 18)
Surface area = 144 + 432
Surface area = 576
So, the surface area of the square pyramid is 576 square units.