Question
Find the centroid of a triangle whose vertices are $(3, -5), (-7, 4)$ and $( 10, -2).$
✓
Answer
Let $O$ be he centroid of $\triangle A B C$
Coordinates of $O$ are
$ O(x, y, z)=O\left(\frac{3+10-7}{3}, \frac{-5+4-2}{3}\right)$
$=O(2,-1) $
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