Exercise 1 Page 637

To calculate the surface area of a rectangular prism, we can use the formula below. S=2(l w+l h+wh) The terms inside the parentheses represent the area of the three possible different sized faces. Each term is multiplied by 2, because opposite faces on a rectangular prism have equal dimensions. These are the same dimensions as we used above, so we will substitute them into the formula to calculate S.

The surface area is 158 ft^2.