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OpenStudy (anonymous):
Help?!?! ABCD is a quadrilateral. If AB = DC,
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OpenStudy (mathstudent55):
AB||CD
OpenStudy (mathstudent55):
If one pair of sides of a quadrilateral is both parallel and congruent, the quadrilateral is a parallelogram.
OpenStudy (anonymous):
thank you for explaining this to me!
OpenStudy (mathstudent55):
There are more. AD = BC also would guarantee ABCD is a parallelogram. If both pairs of opposite sides of a quadrilateral are congruent, it is a parallelogram.
OpenStudy (anonymous):
so I'm stuck? or was that correct?
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OpenStudy (mathstudent55):
I gave you two ways. All you need is one of them.
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