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

• Jun 19th 2012, 05:31 PM
MikeNoob
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 ?
• Jun 19th 2012, 05:51 PM
Soroban
Re: How do you kow that this triangle inside a circle is issocles ? is it a rule ?
Hello, MikeNoob!

Quote:

How can you say that the grey triangle is isosceles?
Code:

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

If \$\displaystyle O\$ is the center of the circle,
. . then \$\displaystyle OA\$ and \$\displaystyle OB\$ are equal radii.
• Jun 19th 2012, 05:53 PM
MikeNoob
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 ?"
• Jun 19th 2012, 06:15 PM
skeeter
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?
• Jun 19th 2012, 06:27 PM
MikeNoob
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!!!
• Jun 19th 2012, 06:41 PM
richard1234
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...?
• Jun 19th 2012, 06:44 PM
MikeNoob
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.. :)
• Jun 19th 2012, 08:31 PM
richard1234
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...