There are Five circles on an NBA court. Center court, Free Throw Lines, and the two nets.
thej are for jump ball´s ,the closest circle is used ;)
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.
10
1
30
6
10
10 players
55
3
10
10