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8^2=3*s^2
64/3=s^2
s=akar 64/3
s=8 akar 1/3
luas permukaan = 6*s^2
=6*(8akar1/3)^2
=6*(64*1/3)
=6*64/3
=384/3
=128 cm^2
s = 8/√3
s = 8√3 / 3
Luas permukaan = 6s² = 6 (8√3/3)² = 6 x 64 x 3 / 9 = 128 cm²