1. a. volume = r^3 = 12^3 = 1728 cm^3
lp = 6r^2 = 6 * 12^2 = 6 * 144 = 864 cm^2
b. v = plt = 6 * 3 * 4 = 72 cm^3
lp = 2 (pl + pt + lt) = 2 (6 * 3 + 6 * 4 + 3 * 4) = 2 (54) = 108 cm^2
c. v = l. alas * t = 9 * 12 / 2 * 10 = 540 cm^3
lp = 2 * l segitiga + 2 * l pp = 2 * 9 * 12 / 2 + 2 * 9 * 10 = 108 + 180 = 288 cm^2
d. v = l. alas * t = (7 + 12) * 6 / 2 * 14 = 57 * 14 = 798 cm^3
lp = l. pp + 2 * l trapesium + l jajar genjang = 14 * 6 + 2 * (7 + 12) * 6 / 2 + 14 * 6 = 84 + 114 + 84 = 198 + 84 = 282 cm^2