Question

In a triangle there are two sides that have the same length and the third side is 2 times longer than the length of the other two. Write an algebraic expression to represent the perimeter of the triangle. Use x as your variable.

Answer 1

Perimeter=4x

Explanation:

let the three sides be a, b and c

Let a=b=x

c = 2 x X = 2x

Perimeter of the triangle= a+b+c

x+x+2x=4x