In general, a ray emanating from a homothetic center will intersect each of its circles in two places. Of these four points, two are said to be homologous if radii drawn to them make the same angle with the line connecting the centers, e.g., the points Q and Q′ in Figure 4. Points which are collinear with respect to the homothetic center but are not homologous are said to be antihomologous, e.g., points Q and P′ in Figure 4.
