The better question is, "How many pythagorean triples are there which have one of the legs as 180, but not the hypotenuse?"
There are up to two of them, I believe.
One I know is {19,180,181}. That's one...
We can plug 180 into the pythagorean triple finder, and there are a couple rules here: https://primes.utm.edu/glossary/page.php?sort=PrmPythagTriples#:~:text=The%20square%20of%20the%20length,5%2C12%2C13).
Play around with that a little and tell us what you find!