Question

If sides AB and DC of a quadrilateral ABCD are parallel, which additional information would be sufficient to prove that quadrilateral ABCD is a parallelogram.

Answer 1

now, if I draw two more parallel lines, I can make a parallelogram:

Answer 2

for a parallelogram, the two diagonals (black lines) have to be congruent. which statement matches the answer choices?

Answer 3

C.

Answer 4

good!

Answer 5

The answer was AB = DC