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Math Help - Help Géo !!

  1. #1
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    Help Géo !!

    Hi !

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  2. #2
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    hint

    Ops menth CDB
    Last edited by Henryt999; January 31st 2010 at 02:37 AM. Reason: krizalid was right
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  3. #3
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    That's false.

    \triangle CDE is actually equilateral, thus \measuredangle\,AEC=75^\circ. On the other hand we have that \triangle BDF is also equilateral, then \measuredangle\,D=90^\circ hence \measuredangle\,FED=45^\circ.

    Finally \measuredangle\,AEC+\measuredangle\,E+\measuredang  le\,FED=180^\circ, which implies that A,\,E and F are collinear.
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  4. #4
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    Quote Originally Posted by Henryt999 View Post
    Note that Ced is a right angle...
    No, that angle = 60 degrees
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