- either of the two lines connecting home plate with first and third base respectively, or their continuations to the end of the outfield.
- a line on the court 15 feet (4.6 meters) from the backboard, from which foul shots are taken.
- a line on an alley at right angles to the gutters and 60 feet (18.3 meters) from the center of the spot for the headpin, across which a bowler may not step for fair delivery of the ball.
