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jadi 432÷3 = √144. 3
jadi diagonal ruang = 12 √3
rusuk = 12 cm
b.
luas permukaan = 12.12.6= 864 cm2
c.
volume= 12.12.12= 1728 cm3
luas permukaan kubus = X 6 = X 6 = 864
volume = = = 1728