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Moderator Note: At the time that this question was posted, it was from an ongoing contest. The relevant deadline has now passed.

I am preparing for competition math and so I found this problem I was wondering if someone could post a solution to it because I can't solve it. This is from a book in the Art of Problem Solving series I am sure some of you have heard of it.

We let ABC be a triangle with sides: AB=4024, AC=4024 and BC=2012 . We reflect the line AC over line AB to meet the circumcircle of triangle ABC at point D (D $\ne$ A). How do we find the length of segment CD?

Thanks!

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    What do you mean by D (D /ne A)?2012-09-27
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    He means $D\ne A$, that is, `D\ne A`2012-09-27
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    Mods, please delete this.This question is from an ongoing contest called online math open. http://onlinemathopen.netne.net/sites/default/files/OMOFall12.pdf See problem no. 16.Do not post solutions here . Is there a way this IP can be reported to the OMO organizers?2012-09-27
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    Actually, here's a better link: http://meta.math.stackexchange.com/questions/4004/contest-questions-on-math-se The community consensus seems to be that if you see something, tell the _contest organisers_ about it. A "no contest question" policy would be very difficult to enforce, and as I mentioned above we _cannot_ give out the IP addresses.2012-09-27
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    This forum is suited better for olympiad problems: http://www.artofproblemsolving.com/Forum/portal.php?ml=12012-12-10

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