Please answer this!! will make you brainliast

Answer:
x = 17 / sqrt (2)
Step-by-step explanation:
first we have to notice that we have a right triangle, this means we can apply Pythagoras
h^2 = c1^2 + c2^2
then we just have to put the values we have and solve the equation
17^2 = x^2 + x^2
289 = 2(x^2)
289/2 = x^2
√289/2 = x
√289 / √2 = x
17 / √2
17 / sqrt (2)