ABCD is a rectangle formed by the points A(-1,一1 ), B(-l , 4), C(5,4 – InterviewSolution

1.	ABCD is a rectangle formed by the points A(-1,一1 ), B(-l , 4), C(5,4) and D(5,-1 ). P.QR and S are the mid-points of AB, BC, CD and DA respectively. Is the quadrilateralPORS a square? a rectangle? or a rhombus? Justify your answer.8.7.5 Summary
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