Jim is building a model of a square pyramid for a class project the side length of the square base is 12 inches and the slant height of the pyramid is 20 inches what is the surface area of the model pyramid

Surface area of a square pyramid is the area of the base + 4 times the area of one of the slanted sides.

Area of base = side length * side length

Area of side = (1/2) * side length * slant height

Don't forget that you have to multiply the area of the side by 4!

Step 1: 12 x 12 = 144

Step 2: 12 x 20 = 240 divided by 2 = 120

Step 3: 144 + 120 x 4