Constructing the Shape of the Square

"Using the line AB given below and the instructions outlined. Construct a square ABCD. 1. Bisect the side AB and the side CD and label the new points where the lines are bisected at point X and point Y respectively. 2. Join point X and point Y with a straight line, what do you notice this does to the Square? 3. Extend the side DC out pass the point C by about 6cm. 4. Now draw a perpendicular from point W down to the line AB which has been extended to meet this perpendicular line at the point of intersection I. 5. When the line WI intersects the extended line AB what do you have? "