[tex]\huge\boxed{(x-1)^2+(y-3)^2=9^2}[/tex]
Start with the standard form of a circle, where [tex](h,k)[/tex] is the center of the circle and [tex]r[/tex] is the radius.
[tex](x-h)^2+(y-k)^2=r^2[/tex]
Plug in the known values.
[tex]\boxed{(x-1)^2+(y-3)^2=9^2}[/tex]
This is the circle's equation in standard form.
