I forget the name. It’s a 2d, one-sided plane that occupies 3d space. Basically, picture a loop of ribbon with a single twist in it. Anyone know what I’m trying to describe?
Just being honest, when I ask myself this and try to think whether I like hexagons or circles more, the favorite shape that says “ahem!” to me and makes me see it’s my favorite, is a woman’s body. I also really love the shapes of big trees and fluffy cats.
The dodecagon! (A 12-sided polygon.) We had to learn about them in 3rd grade, and the mot fun game was to deliberately mispronounce it as “Dody Kay Gon” to annoy our math teacher.