Question

what is the surface area in square inches of a prism with length of 12 inches and with of 9 inches. and. a height of 2 inches​

Answer 1

300 in²

Explanation:

The surface area of a prism is found using the following formula: SA = 2(lh+lb+bh). This formula takes the area of each face (6 in total( and adds them together to find a total sum. Substitute l = 12, b = 9 and h = 2 to solve for the surface area.

SA = 2(lh+lb+bh)

SA = 2(12*2+12*9+9*2)

SA = 2(24 + 108 + 18)

SA = 2(150)

SA = 300