$\left(x-2\right)^2+\left(y-4\right)^2=2\sqrt{5}$\left(x-2\right)^2+\left(y-4\right)^2=2\sqrt{5}

$\left(x-2\right)^2+\left(y-4\right)^2=20$\left(x-2\right)^2+\left(y-4\right)^2=20

$\left(x+2\right)^2+\left(y+4\right)^2=2\sqrt{5}$\left(x+2\right)^2+\left(y+4\right)^2=2\sqrt{5}

$\left(x+2\right)^2+\left(y+4\right)^2=20$\left(x+2\right)^2+\left(y+4\right)^2=20