Jawabanmu

2014-04-11T20:58:03+07:00
LP.kubus=6.a²
             =6.8²
             =6.64
             =384
2014-04-11T20:58:07+07:00
Bidang diagonalnya = 8 cm
Lp = ...
diagonal bidang = s√2
8 = s√2
8/√2 = s
s = 5,66
Lp = 6s² = 6×5,66² = 192,21 cm²