Problem of this week(8/30-9/5/2026)

Assume $ABCD$ is a quadrilateral, the diagonals intersect at $E$, $\angle ABC=\angle ADC$, $BE=ED$, prove: $ABCD$ is a parallelogram.
Thank you! {{message}}

AMC 10/12 exam time:
A: Nov. 10, 2022
B: Nov 16, 2022

AMC 8: January, 17-23, 2023

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