Show that `A(1,-2), B(3,4), C(5,10), D(3,2)` are the vertices of parallelogram.

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This video might not be popular but it will always be viewed by people in need.
So create more.

justshan
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Thank you. This video is the one I am looking for.

baifernv
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But we can also proove opposite side equal rather than prooving diagonal is that okay?

nevedhyagoyal