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Please help. I need to prove ABCD is a parallelogram

Please help. I need to prove ABCD is a parallelogram-example-1
User Davide ND
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1 Answer

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Answer:

It's a parallelogram because it has two parallel sides "a,b"+"d,c" or "a,d"+"b,c". It is connected by "a,d".

Explanation:

User RCN
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