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September 20, 2014

September 20, 2014

Posted by **Emily** on Tuesday, February 7, 2012 at 5:10pm.

- geometry -
**Steve**, Tuesday, February 7, 2012 at 5:31pmThe midpoint D of AB is (3,1)

|CD| = sqrt(1^2 + 9^2) = sqrt(82)

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