How many feet longer is the NBA 3-point line than the NCAA's?
For the 2007 season, the NBA three point line is 4 feet longer
from the goal than the NCAA three point line at the top of the key
(23 feet, 9 inches for the NBA to 19 feet 9 inches for the NCAA).
However, starting in the 2008 season, the NCAA's three point line
will be lengthened to 20 feet 9 inches at the top of the key.