Question

A triangle whose perimeter is three times the length of its side

Answer 1

watever the length is u have to multiply three with it that is 3x

Answer 2

Hey there !!!

Equilateral triangle is a triangle whose perimeter is 3 times the length of the side.

Perimeter of a triangle = a+b+c 

a,b,c are length of sides of the triangle and in a equilateral triangle a=b=c

So , perimeter =a+a+a=3a