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Math Help - isoseles

  1. #1
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    isoseles

    Last edited by perash; December 20th 2007 at 10:26 AM.
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  2. #2
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    Let N be the midpoint of \overline{BE}.

    We have

    \overline{MN}\parallel\overline{BH}\implies\overli  ne{NM}\perp\overline{AH}\implies\overline{AM}\perp  \overline{HN}. Finally \overline{HN}\parallel\overline{CE}\implies\overli  ne{AM}\perp\overline{EC}~\blacksquare
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