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Luas permukaan = 6² + 4(18√2)
= (36 + 72√2) cm²
tinggi segitiga pada sisi limas=
akar(3^2 + 9^2)
akar(9+81)
akar 90
(tinggi segi tiga x alas) x jumlah sisi samping
=(akar 90 x 6) x 4
=24 akar 90
=27 akar 10 cm^2
luas permukaan= luas alas+ luas sisi samping
=36 + 27 akar 10
=73 akar 10