An NFL player.
a basketball is round, there are no sides
No, he is the awesomest person on planet earth.
There is no figure with a greatest number of sides. For any figure with n sides, there will be a figure with n+1 sides.
The greatest number of sides can be any amount of sides.
no it dose not
There is two
These two half circles are at at either sides of the lengths of the basketball court. They are the boundaries across which if a player shoots then it is a 3 point shoot.
The baseline is slightly behind the basket (on both sides of the court).
There is no greatest. Any polygon you draw, no matter how many sides it has, I can always draw a polygon with more sides than yours has. They don't all have names, but there's no limit to the number of sides they can have.