Gauss plane, Cabri-geometry, complex number, centroid, Moivre's theorem, n-th power, n-th root, solution to a polynomial equation, point trajectory, equation of a line, equation of a circle, intersecting circles, orthogonal intersecting circles, Apollonius circle, circle inversion, Lobachevsky's geometry.
Gauss plane, Cabri-geometry, complex number, centroid, Moivre's theorem, n-th power, n-th root, solution to a polynomial equation, point trajectory, equation of a line, equation of a circle, intersecting circles, orthogonal intersecting circles, Apollonius circle, circle inversion, Lobachevsky's geometry.