Jawabanmu

2014-01-10T19:26:11+07:00
Dik :
Panjang : Lebar = 7:5
K = 120 cm
P = 7/7+5 x 120 : 2
= 7/12 x 120 : 2
= 35 cm
L = 5/7+5 x 120 :2
= 5/12 x 120 : 2
= 25 cm