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Thread: Circle proof

  1. #1
    Member jacs's Avatar
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    Unhappy Circle proof

    No idea how to get this one out, i know it is probably simple, just can't see it...grrr
    Attached Thumbnails Attached Thumbnails Circle proof-circle-proof.jpg  
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by jacs
    No idea how to get this one out, i know it is probably simple, just can't see it...grrr
    There is something wrong here, or in my interpretation of this
    problem. $\displaystyle \angle CGF$ is right, and $\displaystyle \angle CAF$ cannot be right as $\displaystyle AF$
    is a cord and not a tangent to the circle with centre $\displaystyle O$. But opposite
    angles in a cyclic quad add to 2 right angles!

    RonL
    Last edited by CaptainBlack; Jan 21st 2006 at 06:57 AM.
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  3. #3
    Member jacs's Avatar
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    Looks like the question has been structured incorrectly then, since it is a scan straight from the actual paper. I will go in and smack my teacher (lol....only joking, will point it out very politely and then glare since i spent so much time trying to work it out....grrrr)


    thanks for your help

    jacs
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  4. #4
    Grand Panjandrum
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    Quote Originally Posted by jacs
    Looks like the question has been structured incorrectly then, since it is a scan straight from the actual paper. I will go in and smack my teacher (lol....only joking, will point it out very politely and then glare since i spent so much time trying to work it out....grrrr)


    thanks for your help

    jacs
    You should check what I wrote, to be sure you agree with its argument.
    We can all make mistakes, and so benefit from others checking our work.

    RonL
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  5. #5
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    Quote Originally Posted by CaptainBlack
    You should check what I wrote, to be sure you agree with its argument.
    We can all make mistakes, and so benefit from others checking our work.

    RonL
    Speak for yourself, I never make mistakes
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  6. #6
    Member jacs's Avatar
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    Quote Originally Posted by ThePerfectHacker
    Speak for yourself, I never make mistakes

    lol..... heee heee

    yes i went over it a number of times and your reasoning looks good to me. I have treid to prove that question over and over and jsut coudltn get it to work, least i know why now

    thanks
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