def triangle_plots(self, basename=None, format='png',
                       **kwargs):
        """Returns two triangle plots, one with physical params, one observational

        :param basename:
            If basename is provided, then plots will be saved as
            "[basename]_physical.[format]" and "[basename]_observed.[format]"

        :param format:
            Format in which to save figures (e.g., 'png' or 'pdf')

        :param **kwargs:
            Additional keyword arguments passed to :func:`StarModel.triangle`
            and :func:`StarModel.prop_triangle`

        :return:
             * Physical parameters triangle plot (mass, radius, Teff, feh, age, distance)
             * Observed properties triangle plot.
             
        """
        if self.fit_for_distance:
            fig1 = self.triangle(plot_datapoints=False,
                                 params=['mass','radius','Teff','logg','feh','age',
                                         'distance','AV'],
                                 **kwargs)
        else:
            fig1 = self.triangle(plot_datapoints=False,
                                 params=['mass','radius','Teff','feh','age'],
                                 **kwargs)
            

        if basename is not None:
            plt.savefig('{}_physical.{}'.format(basename,format))
            plt.close()
        fig2 = self.prop_triangle(**kwargs)
        if basename is not None:
            plt.savefig('{}_observed.{}'.format(basename,format))
            plt.close()
        return fig1, fig2
Returns two triangle plots, one with physical params, one observational

        :param basename:
            If basename is provided, then plots will be saved as
            "[basename]_physical.[format]" and "[basename]_observed.[format]"

        :param format:
            Format in which to save figures (e.g., 'png' or 'pdf')

        :param **kwargs:
            Additional keyword arguments passed to :func:`StarModel.triangle`
            and :func:`StarModel.prop_triangle`

        :return:
             * Physical parameters triangle plot (mass, radius, Teff, feh, age, distance)
             * Observed properties triangle plot.