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Question

Show that points (2,1),(4,0),(3,3) and (3,2) are the vertices of a parallelogram.

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Solution

A(2,1),B(4,0),C(3,3),D(3,2)
AB=(4+2)2+(0+1)2=36+1=37
CD=(3+3)2+(32)2=36+1=37
BC=(34)2+(03)2=1+9=10
AD=(3+2)2+(2+1)2=1+9=10
Opposite are equal
Parallelogram

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