Question

Two sides of a triangle are 14cm and 15cm. The perimeter of the triangle is 39cm. What is the third side

Answer 1

Answer:

Let the third side of the triangle be x.

Since,

sum of all angles of a triangle = permeiter

Therefore,

14 cm + 15 cm + x = 39 cm

29 cm + x = 39 cm

x = (39 - 29) cm

x = 10 cm

So, the third side of the triangle is 10 cm