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Mathematics 9 Online
OpenStudy (anonymous):

Verify the diagonals of a rhombus with vertices A(1,6) ,B(8,6), C(-2,3) and D(5,3) are perpendicular?

OpenStudy (anonymous):

So I get two vectors in component form: u = <4,-3> and v=<10,3>

OpenStudy (anonymous):

I can use the dot product to determine if they are orthogonal. If they are orthogonal, they are also perpendicular.

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