Describes an ellipse in 2D space To create an ellipse there are several ways: Part.Geom2d.Ellipse2d() Creates an ellipse with major radius 2 and minor radius 1 with the center in (0,0) Part.Geom2d.Ellipse2d(Ellipse) Create a copy of the given ellipse Part.Geom2d.Ellipse2d(S1,S2,Center) Creates an ellipse centered on the point Center, its major axis is defined by Center and S1, its major radius is the distance between Center and S1, and its minor radius is the distance between S2 and the major axis. Part.Geom2d.Ellipse2d(Center,MajorRadius,MinorRadius) Creates an ellipse with major and minor radii MajorRadius and MinorRadius The major radius of the ellipse. The minor radius of the ellipse. The focal distance of the ellipse. The first focus is on the positive side of the major axis of the ellipse; the second focus is on the negative side. The first focus is on the positive side of the major axis of the ellipse; the second focus is on the negative side.