Prove that the points (−4,−1), (−2, 4),


Prove that the points (−4,−1), (−2, 4), (4, 0) and (2, 3) are the vertices of a rectangle.


Let A (−4,−1); B (−2,−4); C (4, 0) and D (2, 3) be the vertices of a quadrilateral. We have to prove that the quadrilateral ABCD is a rectangle.

So we should find the lengths of opposite sides of quadrilateral ABCD.







Opposite sides are equal. So now we will check the lengths of the diagonals.







Opposite sides are equal as well as the diagonals are equal. Hence ABCD is a rectangle.

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