When you look at your surrounding environment, it might seem like you're living on a flat plane. After all, this is why you ...

You live on the surface of a giant sphere, like a beach ball the size ... That is, what other spaces around you are 2D? For example, the surface of a giant doughnut is another 2D space.

Faces - A face is a flat or curved surface on a 3D shape. For example a cube has six faces, a cylinder has three and a sphere has just one. Edges - An edge is where two faces meet. For example a ...