SOLUTION: I really need help with this problem I just dont understand. ABCD is a square. If the coordinates of three of it's vertices are A(-1,2a),B(a,2a), C(-a,0)find the coordinates of

Question 114931: I really need help with this problem I just dont understand.
ABCD is a square. If the coordinates of three of it's vertices are A(-1,2a),B(a,2a), C(-a,0)find the coordinates of D
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
Make a square on a piece of paper. Mark the upper left corner "A" and write (-1,2a). on the upper right corner write "B" (a,2a). On the lower right write "C" (-a,0) and on the lower left write D. D has to be (-1,0) as you can plainly see.
Ed
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