Question

Find the perimeter of a triangle whose sides are in the ratio 3 4 5 and the longest side is 15cm

Answer 1

Answer:

let the side of the triangle be x

so the sides are 3x, 4x, 5x

longest side = 15cm

=5x

therefore x= 15/5

= 3cm

so sides are 9cm, 12cm, 15cm respectively

therefore perimeter = (9 + 12 +15)cm

=36cm