Dependence of the |RRM| on the azimuthal angle relative to the disc minor axis for inclined galaxies. Three azimuthal angular bins within 0° < |ϕ|< 30°, 30° < |ϕ|< 60°, and 60 < |ϕ|< 90° of the minor axis are defined for each of the three bins in terms of the impact parameter: b < 100 kpc (red squares), 100 kpc < b < 200 kpc (blue diamonds), and 200 kpc < b < 300 kpc (black circles). The error bars of the angles are the standard deviation of the mean of the azimuthal angles within that bin.