- $ {(x - 1)^2} + {(y - 2)^2} = 4$
- $ {(x - 1)^2} + {(y + 2)^2} = 4$
- $ {\\\left( {x - 2} \\\right)^2} + {\\\left( {y + 1} \\\right)^2} = 4$
- $ {\\\left( {x - 2} \\\right)^2} + {\\\left( {y - 1} \\\right)^2} = 4$