Answers

2015-09-22T16:55:22+05:30
A(-2,5),B(7,1),C(-2,-4),C(7,0)
The midpoint of diagonal AC is(-2-2/2,5-4/2)=(-2,1/2)
The midpoint of diagonal CD is(7+7/2,1+0/2)=(7,1/2)
so not a parallelogram
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