Posted by **Nora ** on Tuesday, December 27, 2011 at 3:33am.

If the adjacent vertices of a square ABCD are A ( -2 , 0 ) , find

- The equation of the two diagonals AC and BD

- The point of intersection O of the two diagonals AC and BD

- The equation of the altitude from O to the side CD

- The centroid of the triangle OCD by finding any two of its medians

- The perimeter of the square ABCD

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