Question

Use a net to find the surface area of the prism??

Answer 1

17*12=204
17*15=255
12*9/2=6*9=54

- than the surface area = 204+255+54= 513

Answer 2

so there is again 9*17=153
and 54 again so

513+54+153=720

- than B. is right sure

Answer 3

(1/2)(9*12) + (1/2)(9*12) + 15*17 + 9*17 +17*12 = 720 --> B as jhonyy9 said