Where does “פוליגון” come from?

פוליגון (Hebrew) comes from English polygon, from Ancient Greek πολύγωνον, from Ancient Greek πολύγωνος, from Ancient Greek γωνία, from Ancient Greek γόνυ, from Proto-Hellenic gónu, from Proto-Indo-European ǵónu — knee.

פוליגון (Hebrew): A polygon, a plane figure bounded by straight...