Respuesta :

Surface area is the sum of all areas. For your rectangular prism, you have to add all 6 rectangles to obtain the surface area.


(9x5) + (3x5) + (9x3) + (3x5) + (5x9) + (9x3) = 174 in^2
Jayland
Look all you got to do is as 9+9+5+5+5+5+3+3+3 so 47 is your answer, you need to add onto all sides.