|
|
|
|
|
|
|
|
9-point Circle as a Locus of Concurrency: What Is This About?
|
| Buy this applet What if applet does not run? |
The applet illustrates a theorem published in 1857 by Griffiths: If a point moves on a fixed line through the circumcenter, its pedal circle passes through a fixed point on the nine point circle.
Copyright © 1996-2009 Alexander Bogomolny
| 33061039 |  |
