%0 Journal Article %T On One Property of a Circle on the Coordinate Plane %A Grafskiy, O.A. %A Ponomarchuk, Y.V. %K a circle on the coordinate plane; real and imaginary points; analytical and constructive solution; mathematical package Maple. %J Geometry & Graphics %D 2017 %N 5 %P 11 %I INFRA-M Academic Publishing LLC.