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Geometry 19 Online
OpenStudy (anonymous):

in quadrilateral PQRS, the coordinates are P(0, 0), Q(a + c, 0), R(2a + c, b), and S(a, b). How can you use coordinate geometry to show that the diagonals are perpendicular?

OpenStudy (anonymous):

Which is the equation of the line that contains points (8, 10) and (–4, 2)?

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