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A (1, 1), B (5, 1), C (4, 2) and D (2, 2) are vertices of a quadrilateral. Name the quadrilateral ABCD. A, B, C, and D are reflected in the origin on to A', B', C' and D' respectively. Locate A', B', C' and D' on the graph sheet and write their co-ordinates. Are D, A, A' and D' collinear ?

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Answer :Isosceles trapeziumA' = (-1,-1) , B' = (-5,-1), C' = (-4,-2) and D' = (-2,-2) , Yes D, AA' and D' are collinear


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