Let ABCD be a parallelogram. M and N are points in AB and BC, respectively, so that AM = NC. Let Q be the point where AN and CM intersect. Prove that DQ bisects angle ADC.

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- August 10th 2012, 03:54 PManonimoomibisector angles in parallelograms. Need help for problem.
Let ABCD be a parallelogram. M and N are points in AB and BC, respectively, so that AM = NC. Let Q be the point where AN and CM intersect. Prove that DQ bisects angle ADC.