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Thread: Circle Theorems

  1. MHB Apprentice

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    #1

    Hi,

    could someone please tell me what theorem I need to be looking at to work out the angle at $\gamma$ please? I've worked out the rest but can't find a theorem for this one.

    Thanks

  2. MHB Master
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    Euge's Avatar
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    #2
    Use the vertical angles theorem.

  3. MHB Apprentice

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    #3 Thread Author
    Quote Originally Posted by Euge View Post
    Use the vertical angles theorem.
    Thanks but that just gives me the angle between the two straight lines. My impression was that $\gamma$ was the part of the angle up to the edge of the circle.

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    #4
    That would not make an angle, for an angle is formed by two straight lines. It would only make sense for $gamma$ to be the angle between those two lines.

  5. MHB Apprentice

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    #5 Thread Author
    Quote Originally Posted by Euge View Post
    That would not make an angle, for an angle is formed by two straight lines. It would only make sense for $gamma$ to be the angle between those two lines.
    That would make things a whole lot easier. Thank you for your help!

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