## anonymous one year ago how do you find the center of a circle with the equation x^2+y^2=81

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1. Nnesha

$\huge\rm (x-h)^2 +(y-k)^2 +r^2$ where (h,k) is the center and r is radius so there aren't any number with x and y what does that mean ?

2. anonymous

That the center is at 0,0 but when I put that in it said it is wrong

3. Nnesha

hmm weird let's graph

4. Nnesha

|dw:1441940137639:dw|

5. Nnesha

center at (0,0)