Question

Pls tell step by step

Answer 1

Answer:

let the third side be x

perimeter of traingle = sum of all sides

60 = 40 + x (sum of two sides is given to be 40)

60 - 40 = x

20cm = x

hope this helps you

Answer 2

$\sf\underline{Answer:}$

Given that sum of two sides of a triangle = 40cm

Perimeter of the triangle = 60 cm

Perimeter of a triangle is the sum of all sides, let the unknown side be 'x'

$40 + x = 60$

$x = 60 - 40$

$x = 20 \: cm$

The length of the other side = 20 cm

Have a good day!