Who discovered/invented polygons?

We know that polygons got their name in Ancient Greece, since the word “polygon” comes to us from the Greek language, polús (much or many) and gōnía (corner or angle). Since gónu is Greek for knee, they may have originally compared corners of a polygon to a person's knees. read more

But we will never know who originally discovered them or who named them, because polygons exist in nature. According to the “History” section here: Polygon - Wikipedia, the pentagram (the star polygon) appeare on a large vase from the seventh century B.C.E. read more