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The midpoint of segment AB is P(0,4). If the coordinates of B are (-2, 3), then the coordinates of A are (a) (2,5) (b) (-2,-5) (c) (2,9) (d) (-2,11) |
Answer» Correct answer is (a) (2,5) Let (x,y) be the coordinates of A. then, \(0=\frac{-2\,+\,x}{2} \Rightarrow x=2\) \(4=\frac{3\,+\,y}{2}\Rightarrow y=8-3=5\) Thus, the coordinates of A are (2,5). |
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