which side of triangle VSY is the base?

Question

Triangle VSY is isosceles and its perimeter is less than 45. segment sv is 10. segment vy is x+7. segment sy is 2x-8.

Answer 1

2 of the sides have to be equal

sv can't = vy because then x=3 and sy is negative

sv = sy means 10 =2x-8 and x =9, then vy = 16

the perimeter is 36 = 10 + 10 +16 which is less than 45