The 3-foot line prevents a batter from interfering with a fielder who is trying to catch a ball, as a batter must stay within that line while running to first. If a batter runs outside the line and bumps a fielder to prevent them from making a catch then it's interference, so the batter must stay inside the line. However, batters usually run outside the 3-foot line if they intend to continue past first base on their hit, but it's only called interference if they truly interfere with a fielder... for example: if the ball was hit to left-field and he runs outside the line, the umpire does nothing, as the player fielding the ball is over a hundred feet away from the line.
127 feet
90 feet
60 feet
every base is 90 feet away from each other
The distance across the diamond is 114.6 feet.
There is 90 feet between each base. So running from 1st to 3rd would equal 180 feet (90 to second, then 90 to third).
89 feet 10 inches
60 feet
98 Feet
Every base is exactly 90 feet apart from the other, so it is neither further from 1st base to second base nor second base to third base.
from a 60ft mound they are 90ft and from a 54foot mound they are 80 ft. In the Major league and High School...90ft. Pitcher's mound would be 60ft 6". Little league they are 60ft.
2nd and 3rd base are 90 feet apart in a Major League Baseball field. This 90 feet is measured from the center of second base furthest from home plate to the back-left corner of third base. The three bases and home plate are set up on the corners of a square with a 90-foot side. But while home plate, first base, and third base are completely inside the square, the center of second base sits on the other corner of the square.