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√32 = sisi x √3
sisi = √(32/3) cm
sisi x sisi = 32/3 cm
Luas permukaan = 6 x sisi x sisi
= 6 x 32/3
= 64 cm²
jadi :
Dengan demikian luas permukaan kubus adalah :
L = 6 x s x s = 6 x 4 x 4 = 96