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= 2(luas alas) x 4(luas bidang tegak)
= 2(s x s) + 4(s x t)
= 2(18 x 18) + 4(18 x 97)
= 2.324 + 4.1746
= 648 + 6984
= 7642
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2 x Lalas +Kalas x t
2x (18x18) + (4x18) x97
2x 224 + 72 x97
448+6984
7432cm²
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