Respuesta :

Answer:

39

Step-by-step explanation:

I don't exactly know how to explain it.

I followed the formula

a^2+b^2= c^2

Answer 39

15^2 + 36^2 = c^2

225 + 1296 = c^2

1521 = c^2

Sqrt1521 = sqrtc^2

39 = c