Several individual conferences allowed the 3-point shot, beginning with the Southern Conference in 1980. The NCAA allowed it in all schools in 1986.
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The NBA adopted the 3 point line at the start of the 1979-1980 season, which is of variable distance, ranging from 22 feet (6.7 m) in the corners to 23.75 feet.
The ABA adopted it in 1967. The NBA adopted it in 1979. The NCAA Southern Conference adopted it in 1980. It was adopted nation wide by the NCAA in 1986.