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Verify that parallelogram ABCD with vertices A(-5, -1), B(-9, 6), C(-1, 5), and D(3, is a rhombus by showing that it is a parallelogram with perpendicular diagonals.​

Verify That Parallelogram ABCD With Vertices A5 1 B9 6 C1 5 And D3 Is A Rhombus By Showing That It Is A Parallelogram With Perpendicular Diagonals class=

Answer :

multiplication of the gradients of the two diagonals is equals to -1 if they are perpendicular

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