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Question

The vertices P, Q, R, and S of a parallelogram are at (3,-5), (-5,-4), (7,10) and (15,9) respectively The length of the diagonal PR is
  1. 241
  2. 124
  3. 200
  4. 180

A
180
B
241
C
124
D
200
Solution
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PR = (37)2+(510)2=16+225=241

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