when is the ball in play at the taking of a corner kick
Corner kick When taking a corner kick, the ball is initially placed so that at least some part of the ball is within the corner arc closest to where the ball went out of play. The corner arc is located at the intersection of the goalline and touchline and has a radius of one yard. All defending players must be at least ten yards (9.15 metres) from the corner arc until the corner kick is taken. A corner kick is taken as soon as the ball is kicked and moves.