## Algebra and Trigonometry 10th Edition

Center: $(0,0)$; Radius: $5$
$(x-h)^2+(y-k)^2=r^2$ (standard form) Center: $(h,k)$; Radius: $r$ $x^2+y^2=25$ $(x-0)^2+(y-0)^2=5^2$ $h=0$, $k=0$ and $r=5$