Show that the points (3, 0), (4, 5), (-1, 4) and (-2, -1) taken in order are the vertices of a rhombus. Also find the area of the rhombus. (Ans: 24 sq units)
Ans : Let AC be d_{1} & BD be d_{2}
Area =1/2 d1d_{2}
Area = 1/2 d1 d2 = 1/2χ4χ6χ2 = 24 sq units