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http://www.mathwarehouse.com/geometry/circle/equation-of-a-circle.php

But what's the answer!?

I'm confused!!!!!!!!!!!!

\[(x-h)^2+(y-k)^2=r^2\] is the equation of a circle with radius \(r\) and center \((h,k)\)

in your case \(r^2=64\)
what is \(r\) ?

And how do I translate that into the real equation?

I actuall don't know what R is. :/

\[(x-h)^2+(y-k)^2=r^2\\(x-5)^2+(y+2)^2=64\] look almost identical

okay, so it's 64. Right?

8?

yes

so that's the answer, right?
8?

hello? :(

yes

okay, thanks. :)

\(64=8^2\) so \(r=8\)
yw

thanks. :)

(this one is also not multiple choice.)

post at a new post, friend