What shapes make up footballs?

Answer 1

Crescents. The definition of a crescent is: two lines the connect at end points, and crescents don't nessicarly mean they have to be shaped like the crescent moon. If drawn correctly, they can be semetrical.

Answer 2

The proper mathematical object is the complex projective space CP1 quotiented out by the group action of Z mod 2 i.e. (CP^1)/(Zmod2)=CP^1/(+-1)

Taking the Riemann Sphere, we identify antipodal points.

Answer 3

prolate spheroid

Answer 4

It is a prolate spheroid.

Answer 5

Everything, the world is 3D.

Answer 6

a square

Answer 7

duck