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Universal Hyperbolic Geometry - Perpendicularity

Author:Lionel GERVAIS
Topic:Geometry
For explanation, you can watch the following YouTube videos :
  • Apollonius and polarity | Universal Hyperbolic Geometry 1 | NJ Wildberger
  • Duality and perpendicularity | Universal Hyperbolic Geometry 9 | NJ Wildberger

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