20. (i) Prove that the points (2,3), (-2, 2), (-1,-2) and (3,-1) are t – InterviewSolution

1.	20. (i) Prove that the points (2,3), (-2, 2), (-1,-2) and (3,-1) are the vertices of aICBSE 2013](ii) Prove that the points (1,7), (4,2), (-1,-1) and (-4,4) are the vertices of asquaresquare.
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