Show that the points ( - 4 , -7) , ( - 1...

Show that the points ( - 4 , -7) , ( - 1 , 2) , ( 8 , 5) and ( 5 , -4) taken in order are the vertices of a rhombus. And find its area.
(Hint : Area of rhombus `=(1)/(2) xx` pro-duct of its diagonals ) `(AS_(2),AS_(4))`

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