Please bantuan nya agak belum paham

a. 12rusuk

b. a+b x t x 1/2 = 7+12 x 6 x 1/2 = 54 x 1/2 = 57

c. 2.La + k.alas x t
= 2 x 27 + (a+b+c+d) x 6
= 54 + (6+7+12+8) x 6
= 54 + 33 x 6
= 504

d. v= luas alas x tinggi prisma
= 27 x 6
= 162