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[" 12.The mid-points of the sides of a "...

[" 12.The mid-points of the sides of a "Delta ABC" are "D(6,1),E(3,5)quad " 22."],[" and "F(-1,-2)" ,then the coordinates of the vertex opposite "],[" to "D" are "],[[" (a) "(-4,2)," (b) "(-4,5)," (c) "(2,5)" (d) "(10,8)]]

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