Question

If two sides of a triangle are 18 cm and 10cm and its perimeter is 42 cm , then find its third side:​

Answer 1

Answer:

14 cm

Step-by-step explanation:

perimeter of triangle = Sum of all three sides

let the 3rd side be x

42= 18+10+x

42=28+x

42-28=x

14=x

Therefore, the 3rd side is 14 cm.

Answer 2

Answer:

14 is the answer of 3rd side