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= 2 x 12 x 4 + 2 x 12 x 3 = 2 x 4 x 3
= 96 + 72 + 24
= 192 cm² (a)
semoga membantu :)
= 2(12)(3) + 2(12)(4) + 2(3)(4)
= 72 + 96 + 24
= 192 cm²