Answers

2015-10-01T23:14:58+05:30
AB²=(-7-5)²+(3-10)²
=144+49
=193 units.
CD²=(15-3)²+(8+5)²
=144+169
=313 units.

Therefore, if any one of the opposite side is not parallel, it is not a parallelogram.
Hence, it is not a parallelogram. 
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