%0 Journal Article %T Circles on the Complex Plane %A Girsh, A.G. %K circle: real, imaginary, degenerated; real circle + imaginary complement; imaginary circle + actual complement; zero circle + left and right isotropies; right angle: real, imaginary; radical axis; radical center; sphere %J Geometry & Graphics %D 2020 %N 8 %P 9 %I INFRA-M Academic Publishing LLC.