Defining the Boundaries of the Court
The game of basketball is defined by boundaries. All of the action in the game must take place within these boundaries. The use of lines to define these boundaries is the most common method of marking a basketball court.
The boundary lines are necessary in order to define the playable area on the court and to let the players and referees know at which point the ball is considered out of bounds. Traditional court dimensions vary based on the level of basketball being played. The following dimensions are standard for organized levels of basketball: