A quadrilateral has vertices A (1, 1), B(3. 4), C(6, 2) and D(4, -1). How do I show that the DIAGONALS are perpendicular to each other.

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- Oct 30th 2008, 02:38 PMmattymath help.. confused
A quadrilateral has vertices A (1, 1), B(3. 4), C(6, 2) and D(4, -1). How do I show that the DIAGONALS are perpendicular to each other.

- Oct 30th 2008, 02:53 PMmasters