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January 11th, 2011, 06:20 AM  #1 
Senior Member Joined: Dec 2006 Posts: 167 Thanks: 3  inscribed circle center problem
As shown in the figure, [attachment=0:te4xwavs]004.gif[/attachment:te4xwavs] 
January 18th, 2011, 12:47 PM  #2 
Senior Member Joined: Dec 2006 Posts: 167 Thanks: 3  Re: inscribed circle center problem
Any ideas? thanks

January 18th, 2011, 01:51 PM  #3 
Senior Member Joined: Dec 2006 Posts: 167 Thanks: 3  Re: inscribed circle center problem
I can see if , then we are done. But how?

January 19th, 2011, 05:36 PM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,472 Thanks: 2039 
Where is this problem from?

January 21st, 2011, 01:13 PM  #5 
Senior Member Joined: Dec 2006 Posts: 167 Thanks: 3  Re: inscribed circle center problem
From a Romania math forum

January 22nd, 2011, 07:36 AM  #6 
Senior Member Joined: Dec 2006 Posts: 167 Thanks: 3  Re: inscribed circle center problem
[attachment=0:3kgq19qn]003.gif[/attachment:3kgq19qn]


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