There are many points competing for the title. What is the center of a triangle? In this dynamic page I gather the five most common contenders. I also throw in some circles and other points as well, trying to cram as much info as possible into this very page.
Oh – and it’s Norwegian, I thought Obama might like it 
(If anyone nags me about it, I’ll make a translation!)
Look here: http://www.geogebra.org/en/upload/files/Norwegian/oisteing/trekantsenter.html
