Question

The perimeter of a triangle is 10 metres and the lengths of two of its sides are and . What is the ratio of its sides?

Answer 1

Perimeter of the triangle = 10 m

Length of the first side =

Length of the second side =

Let the length of the third side be s m.

We know that perimeter of a triangle is the sum of the lengths of all its sides.

∴ + s = 10 m

Therefore, the length of the third side is 4 m.

Ratio of the first side to the perimeter =

Ratio of the second side to the perimeter =

Ratio of the third side to the perimeter =

So, the ratio of the sides of the given triangle is 5:7:8.