Construct a triangle abc whose primeter is 12 cm and the lengths of whose side are in the ratio 3:2:4

Given perimeter of triangle = 14 cm
Since sides are in the ratio 2:3:4
1st side = (2/9) x 14 = 3.1 cm
2nd side = (3/9) x 14 = 4.7 cm
3rd side = (4/9) x 14 = 6.2 cm
Now construct a triangle with sides 3.1 cm, 4.7 cm and 6.2 cm