The ratio of side length of an isosceles triangle is 3:3:2. If the length of the base is 3x-1 and one of its legs is 3x+3, then what is the perimeter of the triangle?

Answer 1

This is a proportion problem:

(3x+3)/3 = (3x-1)/2

6x+6 = 9x-3

3x=9

x=3

side=12 and base = 8

You should be able to get the perimeter now.