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

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How can you say that the grey triangle is isosceles ?

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

Hello, MikeNoob!

We need more information . . .

Quote:

How can you say that the grey triangle is isosceles?

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A

If $\displaystyle O$ is the *center* of the circle,

. . then $\displaystyle OA$ and $\displaystyle OB$ are equal radii.

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

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

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

Quote:

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 ?"

come on Mike ... what do **you say**?

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

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

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

Quote:

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 ?"

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

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

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

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

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