ABCD is a quadrilateral. Drag A, B, or C to reshape the quadrilateral. Check the information on the cases one at a time. Do any of these cases give you enough information to prove that the quadrilateral is a parallelogram? Why or why not?
Prove that ABCD is a parallelogram.
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Angle A = Angle C[br]Angle B= Angle D [br]line AB= Line DC[br]Line AD= Line BC