Nine Point Circle

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You can either download the .ggb file alone or the complete webpage for students with tasks.

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• Offline Activity (.zip)

• GeoGebra Files

  1. Euler, Feuerbach, etc. (.ggb)
     
  2. And if that wasn't enough: (.ggb)
     
  3. Move point P to see what happens when you reflect the orthocenter through the points on the nine point circle. (.ggb)