Answer:
S = 2(3(3) + 3(15) + 3(15))
= 2(9 + 45 + 45)
= 2(99) = 198 cm²
S = 2(.5(8) + .5(11) + 8(11))
= 2(4 + 5.5 + 88)
= 2(97.5) = 195 cm²
S = 2(1(14) + 1(12) + 14(12))
= 2(14 + 12 + 168)
= 2(194) = 388 cm²
