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LII = 6x9/2 - 9 = 27 - 9 = 18 satuan luas
LIII = 6x6/2 - 9 = 18 - 9 = 9 satuan luas
L arsir = 18 + 9 = 27 satuan luas (A)
luas yang diarsir = (6x4/2) + (6x9/2) - (6x3/2) = 30 satuan luas
(tidak ada pilihan jawaban)