Rule 4-20
ART. 1 . . . A free throw is the opportunity given a player to score one point by an unhindered try for goal from within the free-throw semicircle and behind the free-throw line.
ART. 2 . . . The free throw begins when the ball is at the disposal of the free thrower.
ART. 3 . . . The free throw ends when the try is successful, when it is certain the try will not be successful, when the try touches the floor or any player, or when the ball becomes dead.
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