The Nagel Point
A circle drawn outside a triangle that is tangent to the extensions of two of its sides and to the third side is an excircle.
The lines connecting the vertices of a triangle with the corresponding points of tangency of the three excircles are concurrent. The intersection is called the Nagel point.
THINGS TO TRY
The Nagel Point
the Wolfram Demonstrations Project
Embed Interactive Demonstration
More details »
Download Demonstration as CDF »
Download Author Code »
More by Author
The Medial Triangle and Concurrency at the Nagel Point
The Begonia Point
The Schiffler Point
The Gergonne Point
Circumcircles Intersecting at the First Fermat Point
Adams' Circle and the Gergonne Point
A Concurrency from a Point and a Triangle's Excenters
The Center and Radius of the Nine-Point Circle
A Triangle Formed by the Centers of Three Nine-Point Circles
A Collinearity between the Nine-Point Center, the Foot of an Altitude, and a Midpoint
Browse all topics
The #1 tool for creating Demonstrations
and anything technical.
Explore anything with the first
computational knowledge engine.
The web's most extensive
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
STEM Initiative »
Programs & resources for
educators, schools & students.
Join the initiative for modernizing
Step-by-step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in Step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.
© 2014 Wolfram Demonstrations Project & Contributors |
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to
Mathematica Player 7EX
I already have