Jawabanmu

2014-03-11T21:12:39+07:00
Diagonal sisi = s√2 = 10
s=10÷√2 cm
luas permukaan kubus=6s²
=6×(10÷√2)²
= 6×100÷2
=300 cm²
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2014-03-11T21:23:58+07:00
Luas = 6.s
       = 6.10 cm
       = 60 cm2
 semoga membantuu
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