# Chords in a Circle

• Jan 19th 2008, 04:12 PM
Lemon
Chords in a Circle
Just a bit confused, I need to find x:
http://img212.imageshack.us/img212/8729/chords1iu3.png

If I were to add a y, then I could do this:
\$\displaystyle y=1/2(122+32)\$

\$\displaystyle y=1/2(154)\$

\$\displaystyle y=77\$

\$\displaystyle x=180-77\$

\$\displaystyle x=103\$

If not, is there another way to do it? My book did not cover this. :(

• Jan 19th 2008, 04:38 PM
topsquark
Quote:

Originally Posted by Lemon
Just a bit confused, I need to find x:
http://img212.imageshack.us/img212/8729/chords1iu3.png

If I were to add a y, then I could do this:
\$\displaystyle y=1/2(122+32)\$

\$\displaystyle y=1/2(154)\$

\$\displaystyle y=77\$

\$\displaystyle x=180-77\$

\$\displaystyle x=103\$

If not, is there another way to do it? My book did not cover this. :(

Looks good to me. :)

-Dan
• Jan 19th 2008, 04:49 PM
Lemon
Thanks
Really? One of my friends said I couldn't do that. But I suppose if that's right than that's right. :) Thanks for confirming it.
• Jan 20th 2008, 01:16 AM
Pinsky
Where did you get \$\displaystyle
y=1/2(122+32)
\$ from?

Just trying to recall geometry myself...
• Jan 20th 2008, 06:08 AM
janvdl
What on earth...? :confused:
• Jan 20th 2008, 06:46 AM
Krizalid
Yeah, yeah, how does one explain that ¿?
• Jan 20th 2008, 10:28 AM
Pinsky
What does 122 stand for?
Why isn't y 122? It's the number of degrees by that angle...
• Jan 20th 2008, 09:43 PM
Jhevon
Quote:

Originally Posted by Krizalid
Yeah, yeah, how does one explain that ¿?

Lemon is ... a Hacker ¿? :D
• Jan 21st 2008, 01:38 AM
earboth
Quote:

Originally Posted by Pinsky
What does 122 stand for?
Why isn't y 122? It's the number of degrees by that angle...

Hi,

I've attached a more or less exact drawing.