Center: $(0,0)$; Radius: $6$
Work Step by Step
$(x-h)^2+(y-k)^2=r^2$ (standard form) Center: $(h,k)$; Radius: $r$ $x^2+y^2=36$ $(x-0)^2+(y-0)^2=6^2$ $h=0$, $k=0$ and $r=6$
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