Jawabanmu

2014-01-21T19:47:09+07:00
Luas permukaan kubus= 6.s.s
tiap rusuk pnjgnya =8/√2
6.s.s= 6. (8/√2)²
        =  6. 64.2
       = 768
2014-01-21T20:18:05+07:00
S²= 4² + 4²
s²= 16 + 16
s = √32
s = 5.6 Cm

Lp = 6 x s²
Lp = 6 x 5,6²
Lp = 188 cm²

maap klo salah ....