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September 4th, 2016, 11:09 AM   #1
MBI
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Find the center and the radius r of the circle

I have no idea about to even go about doing this. Does anyone mind giving me a hand and explaining it a little?

Find the center and the radius r of the circle given by the following equation.
(x + 7)2 + (y − 2)2 = 25
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September 4th, 2016, 11:38 AM   #2
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Quote:
Originally Posted by MBI View Post
I have no idea about to even go about doing this. Does anyone mind giving me a hand and explaining it a little?

Find the center and the radius r of the circle given by the following equation.
(x + 7)2 + (y − 2)2 = 25
circle equation ...

$(x-h)^2 + (y-k)^2 = r^2$

center at coordinates $(h,k)$, radius = $r$

so, in your equation, (x + 7)^2 + (y − 2)^2 = 25, ...

what is $h$ ?

what is $k$ ?

what is $r$ ?
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