39. Two circles intersect each other in points X&Y. Secants through X&Y intersect one of the circles in A&D and the other in B&C respectively.A&B are on the opposite side of line DC.Show that line AD is parallel to line BC.

39. Two circles intersect each other in points X&Y. Secants through X&

1.	39. Two circles intersect each other in points X&Y. Secants through X&Y intersect one of the circles in A&D and the other in B&C respectively.A&B are on the opposite side of line DC.Show that line AD is parallel to line BC.
Answer» 39. Two circles intersect each other in points X&Y. Secants through X&Y intersect one of the circles in A&D and the other in B&C respectively.A&B are on the opposite side of line DC.Show that line AD is parallel to line BC.