Question: Given quadrilateral ABCD with angle CBD and angle ADB right angles, and that AB=CD. Prove that ABCD is a parallelogram. Hint: Draw both diagonals, get

Given quadrilateral ABCD with angle CBD and angle ADB right angles, and that AB=CD. Prove that ABCD is a parallelogram. Hint: Draw both diagonals, get congruent triangles, then get alternate interior angles congruent.

Could you please help me complete this proof. Thank you!

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