Question

the length of the sides of triangle are ratio 3:4:5 and it's perimeter is 144cm find area of triangle and the height corresponding to the longest side

Answer 1

let the side = 3 x 4 x 5 x
144 = 3x + 4 x + 5 x
x = 144 / 12
x = 12
now we multiply by
3* 12 = 36 Cm
4* 12=48cm
5* 12=60cm

S is equal to 36 + 48 + 60/2
=864cm sq