AB=3x AC=4x BC=5x.bila keliling segitiga ABC=60CM HITUNGLAH LUAS SEGITIGA ABC

Keliling = AB+AC+BC
60=3x+4x+5x
12x=60
X=5

AB = 15
AC = 20
BC = 25

L = 1/2 AB AC
=1/2 x 15 x 20
=150cm²