Surface area of right rectangular prism QuickChek find the surface area of a textbook that is 2“ x 14“ x 9“
To find the surface area of a right rectangular prism, you need to find the areas of all six faces and then add them together.
In this case, the textbook has dimensions of 2" x 14" x 9".
The surface area of the first face is 2" x 14" = 28 square inches.
The surface area of the second face is 2" x 9" = 18 square inches.
The surface area of the third face is 14" x 9" = 126 square inches.
Since the prism has two identical faces for each dimension, you can multiply the surface area of one face by 2 to get the surface area of that face repeated on both sides.
Thus, the total surface area is:
2(28) + 2(18) + 2(126)
= 56 + 36 + 252
= 344 square inches.
So, the surface area of the textbook is 344 square inches.