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put this solution on YOUR website!A conjecture is an educated guess; here are a few examples:
Opposite angles in a parallelogram are congruent.
So in parallelogram ABCD, Angle A=Angle C and Angle B=Angle D.
Adjacent angles in a parallelogram are supplementary.
So in parallelogram ABCD, angle A+D= 180 degrees and angle B + C = 180 degrees.
Opposite sides of a parallelogram are equal in length.
So in parallelogram ABCD, AD=BC and AB=DC