The Nagel Point

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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.

External Links

Nagel Point (Wolfram MathWorld)

Permanent Citation

Jay Warendorff
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​"The Nagel Point"​
​http://demonstrations.wolfram.com/TheNagelPoint/​
​Wolfram Demonstrations Project​
​Published: March 7, 2011