if the length of two sides of an isosceles triangle are 7 and 15, what is the perimeter of the triangle?

Answer 1

Nice question.
At first it appears that there is not enough information, since you don't say which number is used for the pair of equal sides.
But the sum of any two sides must be greater than the third side, so it must be 7,15,15 or else we can't form a triangle with 7,7,15

So the perimeter is 37