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L limas tanpa alas = ½ x t sisi tegak x K alas
L = ½ x tinggi sisi tegak x (4s)
L = ½ x 10 x (4x12)
L = 240 cm²
L kubus tanpa atap = 5s²
L = 5 x 12²
L = 720 cm²
Luas seluruh bangun = Luas limas + Luas kubus = 240 + 720 = 960 cm²
done(: