 The kind of symbol on a street sign to indicate there's a football stadium over here is a picture of a football. But the classic football has pentagons and hexagons. It's got 12 pentagons, 20 hexagons. However, for some reason, and I've never found out why, when they designed the sign, instead of having five-sided pentagon panels in the picture, they swapped them out for six-sided hexagons.