The diagonals of a parallelogram ABCD intersect at O. A line through Ointersects AB at X and DC at Y. Prove that OX = OY.

The diagonals of a parallelogram ABCD intersect at O. A line through O
intersects AB at X and DC at Y. Prove that OX = OY.

Match the items on the right to the items on the left.

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