Balls can be spherical or not. The (American) football uses a ball that is far from spherical. However, a sphere is a perfect geometrical solid with a uniform radius, and a ball made in that shape is quite suitable for games. It will, for instance, bounce in a predictable way.
Chat with our AI personalities
The soccer ball is round in three dimensions. It's a sphere. (The Laws of the Game actually specify a spherical ball.)
Soccer balls are not always spherical in shape; commonly, the surface of a soccer ball is composed of many hexagonal patches that are slightly ridged.
baseball, basketball, and volleyball
A spherical shape like a ball.
Spherical balls have no corners. The American football has 2 corners. A ball (of any shape) may be sewn together of polygons each of which has several corners (vertexes).