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August 25th, 2012, 08:22 PM  #1 
Newbie Joined: Aug 2012 Posts: 1 Thanks: 0  find radius if a circle is inscribed in quadrilateral 
August 25th, 2012, 08:49 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Re: find radius if a circle is inscribed in quadrilateral
Drop a vertical radius down from O to DC, and call this point P. We see that DP = r and PC = 11 cm, and DP + PC = 25 cm, hence, r = 14 cm.


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circle, find, inscribed, quadrilateral, radius 
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