The length of one side of an isosceles triangle is 7, and the length of one side is 9

The length of one side of an isosceles triangle is 7, and the length of one side is 9

If waist is 7, circumference = 7 + 7 + 9 = 23
If the waist is 9, the circumference = 9 + 9 + 7 = 25