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Parallelogram $ABCD$ has $A(0, 1)$, $B(2, 1)$ and $C(4, 0)$ as three of its vertices. What is the sum of the coordinates of point $D$?

 Jul 3, 2018
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D(2|0)   sum: 2

laugh

 Jul 4, 2018
edited by Omi67  Jul 4, 2018

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