What does the semicircle under the basket in the NBA court mean, why is there no one in the CBA.

Every NBA court has it, and that's the offensive reserve.

If the defender stands within that small half-circle, there is no such thing as hitting someone with the ball.

Unlike FIBA. Normal collisions are encouraged.

Reasonable Collision Zone, in which offensive players are protected from being whistled for offensive fouls, and blowing back for defensive blocking fouls is a unique rule in the NBA that encourages offense.

Reasonable Collision Zone, in which offensive players are protected from being whistled for offensive fouls, and blowing back for defensive blocking fouls is a unique rule in the NBA that encourages offense.

Small half circle??

Didn't notice.

3 or 3 second?

That's the three-second zone; The area with a semi-circular arc in it also belongs to the three-second zone, and the semi-circular arc is a dotted line and has no practical meaning.

The international rule is that it belongs to the three-second zone, and in the NBA, a semicircle is drawn under the basket as a reasonable collision zone for offensive personnel.

It's an offensive zone. It's when an offensive player collides with a defender there. The referee will award a foul to a defending teammate.

Buffers, semicircles of dotted lines in the 3-second zone are meaningless.

Three-second zone (restricted zone) and reasonable collision zone.

It's a reasonable rush to go, three seconds to go,

A foul is not counted as an offensive foul in a semi-circular arc.

Defenders stand inside and defend for three seconds.

Reasonable collision zone. Standing within the arc, a defensive foul may be awarded as long as the defender makes physical contact with the offensive player. In addition, the defender can stand up in advance, and if the offensive player touches the defender with his body, the offensive player will be sentenced to hit someone.

In a reasonable collision zone, when the opponent is attacking, the defender will not be whistled for a foul if he jumps, and if he does not jump, he will be whistled for a defensive foul.

The outermost is the boundary, and then the straight line in the middle, and a complete line crossing, is to represent the midfield, and the circle is the opening jump ball, when the two sides stand in the semicircle to jump the ball. Then, the large semicircle under the basketball hoop is the three-point line (shooting a goal outside the three-point line is worth three points), and the trapezoidal shape inside the semicircle is the three-second zone. The top and bottom of the trapezoidal shape is called the free throw line, and there is a small circle that is divided into two parts, the outer part of which is where the free throw stands.

Some regular basketball courts In the trapezoidal area, there is probably a dotted semicircle directly below the basket, this area is a reasonable collision area, if the defender stands here or steps on this semicircle, then the collision with the attacking side is likely to blow the defender foul.

Hello, the arc under the hoop in the three-second zone of the basketball court is a reasonable collision zone.

In addition to the outside three-point, the current basketball competition is more of a run-and-bomb tactic, and more is a breakthrough layup, which increases the probability of a foul under the basket, so the rules stipulate that if there is a collision under the basket, the player who is hit is a reasonable collision outside the arc, and if it is in the arc, it is also a foul situation, I hope to help you, I hope to adopt.

The Reasonable Collision Zone, 1 Reasonable Collision Zone, applies only to the co-defender (a defender who is not actively defending the ball).

2. The offense must have started outside the low defensive zone, otherwise the co-defender does not need to consider being blown and blocked;

3. The main marker of the offensive player can make offensive fouls no matter what position he is in contact with the attacker;

4. In the fast attack, all defenders are regarded as co-defenders;

5. Even if he is in a reasonable collision zone, if the assistant defender falls vertically when trying to block, then he will not be blown to block;

6. If the offensive player and the assistant defender make contact in a reasonable collision zone, but the attacker uses unconventional knee or foot movements, then the offensive foul may also be whistled.