February 16th, 2018, 12:51 PM  #1 
Newbie Joined: Feb 2018 From: Roman, Romania Posts: 2 Thanks: 0  Triangle inequality
Let ABC a triangle and O I H are noncollinear. R₁ is radius of circumscribed circle of OIH. Show that R₁>R/2, where R is radius of circumscribed circle of ABC.
Last edited by skipjack; February 16th, 2018 at 02:41 PM. 
February 16th, 2018, 01:02 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,584 Thanks: 610 
What are O I H? How do they relate to the triangle?
Last edited by greg1313; February 16th, 2018 at 11:26 PM. 
February 16th, 2018, 01:08 PM  #3 
Newbie Joined: Feb 2018 From: Roman, Romania Posts: 2 Thanks: 0 
H = orthocentre I= incentre O = circumcentre 

Tags 
inequality, triangle 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Triangle Inequality: Prove Absolute Value Inequality  StillAlive  Calculus  5  September 2nd, 2016 11:45 PM 
a triangle inequality  Albert.Teng  Algebra  2  December 18th, 2013 04:44 AM 
triangle inequality  Albert.Teng  Algebra  20  August 16th, 2013 04:43 PM 
triangle inequality  mathrookie2012  Applied Math  0  January 29th, 2012 03:57 PM 
triangle inequality  mathrookie2012  Real Analysis  2  January 28th, 2012 07:25 AM 