Step-by-step explanation: Find the surface areas of the rectangular prism and the triangular prisms separately. Triangular: S = (1/2)lP+B, where l is slant height, P perimeter, and B base area. 14(4)= 56 perimeter of base 13 slant height B = 14x14 = 196 put together: S = (1/2)(13 x 56) + 196 S = 560 in^2
Now the rectangular prism S = 2lw + 2lh + 2wh, where l is length, h height, w width. (delete the first 2lw since they share one side/they're combined shapes. S = 2(14x8.9) + 2(14x8.9) S = 498.4 in^2
