Visual illustration

The lines connecting each vertex of a triangle ABC with the point of tangency between the opposite side and the opposite excircle are concurrent at a point called the Nagel point.

See complete interactive proof with animation and key concepts at:

www.gogeometry.com/nagel_point1.htm

Level: High School, SAT Prep, College geometry

## Sunday, August 31, 2008

### Triangle Centers: Nagel Point Proof

Labels:
Ceva's theorem,
concurrent,
excircle,
Nagel theorem,
tangency point,
triangle

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