Please help me with this prove.
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Are AB and CD equal?
Thank you for your answer.
I don't understand this. Please give me a simple prove.
Last edited by malaygoel; June 27th 2009 at 01:05 AM.
Thanks a lot!
I also spent sometime thinking about this problem again and found an another way of solving.
Triangle BDG is a right isosceles triangle. ADGC is a parallelogram.
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