Jawabanmu

2014-04-04T06:45:38+07:00
3:2 
> 3:2 x 15 = 10 cm (lebar)
> keliling = (15+10) x 2 = 50 cm
2014-04-04T07:23:05+07:00
P = 15 cm
p : l = 3 :2
l =10 cm

k = 2.(p+l) = 2.(15+10) = 2.25 = 50 cm