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2a = 60 cm²
luas b = p x t
= 13 x 15 = 195 cm²
luas c(alas) = p x l
15 x 5 = 75 cm²
luas d = p x l
15 x 12 = 180
LP = 60 + 195 + 75 + 180 = 510 cm²
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