|
|
|
|
|
|
|
|
|
9-point Circle as a Locus of Concurrency: What Is This About?
|
| Buy this applet |
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 © 1996-2008 Alexander Bogomolny
| 28737461 |  |
|