Show that the points (-4,-7), (-1,2), (8,5) and (5,-4) taken

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10th class|Maths|Co-ordinate Geometry |Show that the points (-4,-7), (-1,2), (8,5) and (5,-4) taken in order are the vertices of a rhombus. Find it's area.
(Hint : Area of rhombus= 1/2 * product of it's diagonals)
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