When did they start the 3 point shot in basketball?
No context provided
When did they start experimenting with the 3 point shot in basketball?
1945
No context provided
When did they start the 3 point shot in ABL basketball?
1961
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When did they start the experimenting with the 3 point shot in NBA basketball?
June 1979
The sport's international governing body, FIBA, introduced the three-point line in 1984, and it made its Olympic debut in 1988 in Seoul, South Korea.
When did they start the 3 point shot in Olympic basketball?
1988
Three-point field goal
Used only in conference play for several years, it was adopted by the NCAA in April 1986 for the 1986–87 season at and was first used in the NCAA Tournament in March 1987. The NCAA adopted the three-pointer in women's basketball on an experimental basis for that season at the same distance, and made its use mandatory beginning In 2007, the NCAA lengthened the men's distance by a foot to , effective with the season, and the women's line was moved to match the men's in 2011–12. American high schools, along with elementary and middle schools, adopted a line nationally in 1987, a year after the NCAA. The NCAA experimented with the FIBA three-point line distance in the National Invitation Tournament (NIT) then adopted that distance for all men's play with a phased conversion that begins with Division I in the 2019–20 season. In that same 2019–20 season, the NCAA is experimenting with the FIBA arc in women's postseason events other than the NCAA championships in each division, most notably the Women's National Invitation Tournament and Women's Basketball Invitational.
When did they officially start the 3 point shot in NCAA basketball?
April 1986
Three-point field goal
Three-point field goal
https://en.wikipedia.org/wiki/Three-point%20field%20goal
 They experimented with the three point in 1945. It was not officially used until 1961 in the ABL, June 1979 in the NBA, April 1986 in the NCAA, and 1988 in the Olympics.