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Re: A collinearity

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  • Harold Connelly
    Dear Luis, A proof for this problem is given by Honsberger in Episodes in Nineteenth and Twentieth Century Euclidean Geometry . Regards, Harold
    Message 1 of 2 , Aug 5, 2009
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      Dear Luis,

      A proof for this problem is given by Honsberger in "Episodes in Nineteenth and Twentieth Century Euclidean Geometry".
      Regards,
      Harold

      --- In Hyacinthos@yahoogroups.com, Luís Lopes <qed_texte@...> wrote:
      >
      >
      > Dear Hyacinthists,
      >
      >
      >
      > In http://www.gogeometry.com/index.html I found problem 321 that states:
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      > The figure shows a triangle ABC with incenter I, and M midpoint of the altitude AH.
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      > If F is the point of tangency of BC and the excircle relative to BC, prove that M, I, and F are collinear.
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      > Or I, M midpoint of AH_a and X_a.
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      > I would appreciate hints for a sinthetic proof.
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      > Best regards,
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      > Luis
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      >
      >
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