.0000);  (0,0) circle \[x radius=[sqrt(0)]{}, y radius=[sqrt(0)]{}\];  hyperbola lambda=0.0000 plot (,[sqrt(0+0.0000)\*sqrt(0-/(0-0.0000)]{}); plot (,[-sqrt(0+0.0000)\*sqrt(0-/(0-0.0000)]{});  ([sqrt(00)+0]{},-0) - (-0,[sqrt(00)+0]{}); ([-sqrt(00)-0]{},0) - (0,[-sqrt(00)-0]{}); (0,[sqrt(00)+0]{}) - ([-sqrt(00)-0]{},-0); (-0,[-sqrt(00)-0]{}) - ([sqrt(00)+0]{},0);  (.0, -0.000