(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the center and the radius of the circle with the given equation.

2. Relevant equations

x^{2}+y^{2}+4y-117=0

3. The attempt at a solution

I first got it in standard form by completing the square:

x^{2}+(y+2)^{2}=121

but i don't know how to get the center and radius of it? I'm pretty sure its given in that form of the equation, right? but i'm not sure which numbers are the ordered pair.

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# Homework Help: Finding the center and radius of circles given an equation

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