How do you kow that this triangle inside a circle is issocles ? is it a rule ?

Attachment 24115
How can you say that the grey triangle is isosceles ?

Hello, MikeNoob!

We need more information . . .

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How can you say that the grey triangle is isosceles?

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              * * *
          *          *
        *              *
      *                *

      *        O        *
      *        ♥.        *
      *        *:*.      *
                *:::*.
      *        *:::::*. *
        *      *:::::::♥
          *    *:::: *  B
              * ♥ *
                A

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If is the center of the circle,
. . then and are equal radii.

Thanks for the reply Soroban So are you saying that "A triangle having two radii as its sides is always an isosceles ?"

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Originally Posted by MikeNoob

Thanks for the reply Soroban So are you saying that "A triangle having two radii as its sides is always an isosceles ?"

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come on Mike ... what do you say?

Haa.. after having a cup of coffee and reading your response, I realize this was an extremely dumb question. LOL... Thanks for that!!!

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Originally Posted by MikeNoob

Thanks for the reply Soroban So are you saying that "A triangle having two radii as its sides is always an isosceles ?"

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Think a bit...if OA = OB, then OAB is...?

@Richard.. I realize that I wasnt really thinking when posting this question.. :)

Yeah, sorry, I think we posted right at the same time. We've all had those moments...