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K = 32 cm
maka :
K = 4 x sisi
sisi = 32 / 4
sisi = 8
Lp kubus = 6 x sisi²
= 6 x 8²
= 384 cm²
Luas Permukaan = rusuk x rusuk x 6 = 8 x 8 x 6 = 384 cm2