Answers

2016-03-11T08:41:58+05:30
Let A=(1,-2)=(x1, y1)
B=(2,3) =(x2, y2)
C=(-3,2)=(x3, y3)
D=(-4,-3)=(x4, y4)
Then find slope of line AC & BD
if they are collinear to each other then it is a parallelogram

after that use point slope form for finding the equation of base AB
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