math
posted by Nora .
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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