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l2 = 17 *17 =289
l = 360+289 =649
ldiarsir = l - l tidak diarsir =649-529 = 120
Lpqrs = 17^2 = 289
L tidak arsir = 529cm^2
L arsir = (Labcd + Lpqrs) - L tidak arsir = (itulah jawabannya)