Work out the length x.

Answer:
Aprox. 14,2
Step-by-step explanation:
Use Pythagoras Theorem
a^2 = b^2 + c^2
b^2 = a^2 - c^2
X^2 = 17^2 - 9^2
X^2 = 289-81
X^2 = 207
X = 14,2