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OpenStudy (anonymous):
The vertices of quadrilateral ABCD are A(1,2) B(10,5), C(9,8), and D(0,5). prove that quadrilateral ABCD is a rectangle
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rishavraj (rishavraj):
arrange all the coordinates on a paper in orderd sequence... and then find out length , breadth and also length of the diagonal... check if the vertices are at right angles..if it is so then its a rectangle
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