The first end zone line, ususally referred to as the goal line.
The red zone is the area of the field between the opponent's 20-yard line and the goal line. When the offense has advanced into this territory, it is expected that it will score some type of points, i.e. a touchdown or a field goal.
It's just a nickname for the area between the 20 yard line and goal-line where an offense has a good chance at scoring. You could also say its a warning for opposing defenses to make a stop during the opposing team's drive. It's basically a nickname that came into being as a warning to the defense who is "in the red".
18-19 yards behind the 1 yard line
a safety
The defense will have the ball at their own 20 yard line.
The kickoff is from the kicking team's 30 yard line making the kickoff travel 70 yards to reach the end zone.
its a touchback and you start on your own 20 yard line If it is determined that your momentum carried you into the end zone, the play is considered a touchback, and the ball will be placed on your 20-yard line. If it is determined that you intentionally carried the ball back from the field of play into the end zone -- for example, if you cleanly fielded the ball at the 1-yard line, and then deliberately stepped backwards into the end zone and took a knee, in an attempt to gain extra yardage with a touchback -- your team will be assessed a safety, and you'll have to kick off from your own 20-yard line.
If the player does not step outside of the end zone before stepping out, then it is ruled a touch-back and the ball is placed at the 20 yard line. However if he steps out of the end zone then steps out inside the end zone it is ruled a safety and the other team gets 2 points and the team that stepped out in the end zone then gets a free punt.
In the NFL, after a touchdown the ball is placed at the two yard line. In college ball, after a touchdown the ball is placed at the three yard line. That would make an extra point 19-20 yards in length.
if you mean how far away form the end line is the 18 yard line, it is 18 yards from the end line! sort of self explanatory really!
probably the 18 yard box all the way to the end line