In basketball, the rim is a metal circle that the ball must pass through in order to score a point. The goal is for players to shoot the ball through the basket and get points for their team. The ring is an integral part of the game. It serves as a boundary for the court, which prevents players from entering the area outside the ring. Also, balls that are out of play can be taken back inside the ring where they are fair game for future shot attempts. There are two types of rims used in basketball: the goal rim and the basket rim. The goal rim is placed at each end of the floor near the center line, while the basket rim is attached to the backboard. Both rims must be made of steel or aluminum, but wood rims are also used by some coaches. The goal rim should be about 18 inches high, while the basket rim should be 10 inches high. The ring is important because it protects the walls and ceilings of gymnasiums from damage that could be done by falling balls. It also ensures that players cannot leave the playing area by going under the hoop. Last, but not least, it defines the scoring zone.