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panjang = 3/2 x 6 = 9 cm
luas = p x l = 9 cm x 6 cm = 54 cm
p:l = 3:2
p:6 = 3:2
p = 6×3:2
p = 18:2
p = 9 cm
L = p×l
L = 9×6
L = 54 cm persegi