Let's look at our rectangular prism to find the length l, width w, and height h.
Our prism has the dimensions l= 6, w= 3, and h= 5. To calculate the surface area of a rectangular prism, we can use the following formula.
SA=2(l w)+2(l h)+2(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. Now we substitute the dimensions of our prism into our formula to calculate SA.
