# A Concurrency from the Reflections of the Contact Points with the Excircles

Initializing live version

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.

Let ABC be a triangle. Let A' be the contact point of the excircle opposite A with BC. Let A'' be the reflection of A' in the line through the contact points of with the extensions of AC and AB. Similarly define B'' and C''. Then AA'', BB'', and CC'' are concurrent at a point S, called the Schiffler point.

Contributed by: Jay Warendorff (March 2011)

Open content licensed under CC BY-NC-SA