Jawabanmu

2014-04-07T14:46:38+07:00
L.2s.kubus= 72cm^2

72=2.s^2
72/2=s^2
36=s^2
6=s
2014-04-07T19:35:34+07:00
L 2 permukaan = 72 cm²
L 1 permukaan = 72/2 = 36 cm²
Lsisi = rusuk²
rusuk = √36 = 6cm