February 20th, 2017, 03:35 PM  #1 
Newbie Joined: Feb 2017 From: Texas Posts: 1 Thanks: 0  Help. Circumcenter and Incenter
I don't know how to do this! Please help with answer and explanation.

February 20th, 2017, 04:12 PM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 2,549 Thanks: 1259 
look at triangle BDC ... angle DBC = 73, angle BCD = 21 ... how big is angle BDC? once you determine angle BDC, look at triangle BDP 

Tags 
circumcenter, incenter 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
The trilinear coordinate of circumcenter  elim  Geometry  2  September 15th, 2015 05:54 AM 
Prove circumcenter coincides with orthocenter  USAMO Reaper  Geometry  4  July 10th, 2015 03:13 AM 
Incenter and Orthocenter  Albert.Teng  Algebra  0  January 21st, 2013 06:06 PM 
Circumcenter Proof  julian21  Geometry  1  September 28th, 2010 03:47 PM 
Incenter and Circumcenter given 3 points  mathsiseverything  Geometry  1  February 21st, 2008 04:33 PM 