Question

The perimeter of a triangle is75cm. Two of the sides are 20cm and 30cm, find the third side.

Answer 1

Step-by-step explanation:

let the third side be x

perimeter of triangle = sum of all sides

= 20+30+x = 75

= 50+x = 75

= x = 75-50

= x = 25

Third side will be 25cm