If any part of the ball is touching the line, but the rest is out, it is still called in.
No
"out"
The ball is only considered out if the whole ball is in front of the line, meaning if only a fracton of the ball lands on it and the rest is over, it is still called in.
In singles you can serve to any part of the table. In doubles you can only serve to/from the right court. If the ball touches the line, it is in.
"Line Umpires" watch the lines or boundaries of the tennis court. They decide whether the ball lands in or out. However in a final arguement, the Chair Umpire has the final call.
if the ball lands on the line it is considered in and it depends on the situation your in to determine it good or bad
"In" If any part of the ball lands on the end or side line then the ball is in.
If your asking if its IN or OUT. its IN
The base line, the line in the back.
The baseline
In the tennis you should have to do the following things,At first you need atleast two players. Then atleast one Tennis ball.When you put serve:You have to serve the ball from your right side to the left side of the opposite side (beyond the net) but the ball should not cross the service line. if the ball crosses your serve is fault.you have another chance to serve. if you put the serve correctly the opponent player will hit the ball back to your place. And you should hit the ball back to his side (within the court line) either with forehand stroke or backhand stroke. if you play singles the ball should fall within or on the singles line, if you play doubles the ball should fall within the doubles line.These are all the things you should do when you serve.When your opponent serve:when your opponent serve you should hit the ball back to his side either with forehand or backhand. This is what to do in the tennis. In short You should play Tennis game.
As long as the ball is touching the line, it is considered in. Even if the majority of the tennis ball is out, as long as a tiny sliver of that tennis ball is touching the line, it is considered in.