2 years ago

Is ABCD a parallelogram?

Mathematics

1 answer:

spayn [35]2 years ago

7 0

Answer:

Yes

Step-by-step explanation:

We know that because AB and CD are parallel,

angles A and D are supplementary
angles B and C are supplementary

As supplements of congruent angles are congruent, this means angle B is congruent to angle C.

Thus, ABCD is a parallelogram because it is a quadrilateral with 2 pairs of opposite congruent angles.

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