Jump Ball
In high school and college basketball, there is a jump ball at the beginning of the game and at the beginning of each period of overtime played. After the jump ball, teams take turns getting possession of the ball(called alternate possession) when the ball is tied up.
3 pont arc
The 3 point arc in the NBA is 22ft to the center of the rim on the sides ( the arc starts 5 ft 3 in from the baseline, being a straight line until that point) then the curved part of the arc is 23ft. 9 in. from the center of the rim.
The 3 point arc in college and high school is 19 ft 9 in. (The straight part extends 63 in out from the baseline before the arc begins).
Blocking/ Charging Foul
Blocking is personal contact which impedes the progress of an opponent. Charging is personal contact, with or without the ball, by pushing or moving into an opponent?s torso. When judging a block/charge, the official shall use the following principles: 1)the defender must establish an initial legal guarding position, 2)the defender may remain stationary or move laterally or backwards in order to maintain the guarding position, 3)In moving to maintain the guarding position, one or both feet may be off the floor for an instant, as long as the lateral or backwards movement is considered normal defensive movement,4)the defensive player must be on the spot first, and contact must occur on the torso.
3 Seconds in the Key
The rule states While his team is in control of the ball, a player shall NOT remain for more than three (3) consecutive seconds in the opponents? restricted area.
The lines bounding the restricted area are part of the restricted area and a player touching one of these lines is in the area.
The 3second restriction is in force in all outofbounds situations.
The count shall start at the moment the player making the throwin is outofbounds and the ball is at his disposal (is in play).
The 3second restriction does NOT apply:
a. While the ball is in the air during a shot for goal.
b. During a rebound.
c. When the ball is dead.
Allowance must be made for a player who, having been in the restricted area for less than 3 seconds, gets the ball inside the key. The player now has 3 more seconds to shoot or pass and get out of the key.
Travelling
Travelling is progressing with the ball while moving one or both feet in one direction while holding the ball.
Height
The distance from the ground to the rim is 10 ft.
Dribbling Rule
A dribble starts when a player throws, taps, or rolls it on the floor and touches it again before it touches another player. The dribble is completed when the player touches the ball simultaneously with both hands or the ball comes to rest in one or both hands. Accidentally losing and then regaining control(fumble),tapping the ball in order to gain control,tapping the ball from the control of another player, blocking the pass and then recovering the ball are NOT considered to be dribbles.
Double Dribble
After dribbling and after the dribble has ended, a player may not begin dribbling again or at any time dribble more than once with two hands. This is called a double dribble and is a violation, with the penalty being loss of the ball to the opposing team.
Illegal Use of Hands
Illegal use of the hands occurs when a player contacts an opponent with his hand(s) in an attempt to play the ball. If the contact is with the opponent?s hand while it is on the ball, it shall be considered incidental contact.
Pivot Foot
You must establish a pivot foot if you have the basketball and are not dribbling. If you catch the ball with both feet on the ground, you may use either foot as the pivot foot(in which one foot remains in contact with the same point on the ground). If you catch the ball while moving or after dribbling,if you land on 2 feet simultaneously, either foot may be used as the pivot foot. If one foot is touching the floor, when the second foot touches the floor, the first foot becomes the pivot foot. A player may make one step and then jump simultaneously on two feet, in which case neither foot may act as a pivot foot.
30 Second Rule
When a team gains possession of the ball, a shot must hit the rim within 30 seconds(girls and womens basketball). If a shot does not hit the rim within the allotted time, it is a violation, and the ball is awarded to the opposing team.
Key
The key is 12 feet wide (the width of the free throw line) the backboard should extend 4 feet out over the baseline. The 12 ft wide free throw line forms the center of a circle with a 6 ft radius.
Personal Fouls
A foul is an action that involves contact with an opposing player, whether the ball is alive, in play or dead. A player shall not block, hold, charge, trip, impede the progress of an opponent by extending his arm, shoulder, hip, knee, or foot.
Main purpose of the game
Basketball is played by two teams of five players on each team. The purpose of each team is to score into the opponents basket and to prevent the other team from scoring.
Substitutions
When substituting, the substitute shall report into the official scorer at the scorer?s table, and then wait until an official beckons you in during a dead ball. If you just run onto the court(illegal substitution), it is a technical foul on your team.