Try to divided it and see what is the outcome
Answer:
It would be great if you would provide the image itself. I will totally answer your question.
10 would be the answer because it is a ijdndnskoskansnsjdjksmskkssksjjsjxhxjdjdnd
Use Pythagorean theorem
/17 ^ 2 + x ^ 2 = 20 ^ 2
17 + x^2 = 400
x^2 = 383
x = 19.57