Jawabanmu

2014-05-09T10:13:17+07:00
Sisi kuadrat= 8 kuadrat + 6 kuadrat = 64 + 36 = 100
sisi = 10 cm
keliling = 10 x 4 = 40 cm

harusnya ada di optionnya 40cm
2014-05-09T10:16:43+07:00
Ambil setengah diagonal => 12 : 2 = 6   16 : 2 = 8   cari sisinya pake tripel phytagoras  6,8,10
jadi sisinyaa = 10

kell= 4x10 =40