Question

The perimeter of a triangle is 57 cm if two sides of a triangle is 18 CM and 13 CM the third side

Answer 1

perimeter = 57cm
let the 3rd side be x
so 18cm + 13 cm + x = 57
31 + x =57
x = 57- 31
x= 26cm

Answer 2

hola^_^

your answer is - - - -

perimeter of triangle=57cm

two sides given are

=18cm

= 13 cm

let third side be x

so,

18+13+x=57

31+x=57

x=57-31

x=26

measure of 3rd side will be=26cm..