Justin, Jacques Mathematical remarks about origami bases. (English) Zbl 0884.51016 Symmetry Cult. Sci. 5, No. 2, 153-165 (1994). When we fold the traditional bird base (Orizura Kiso, in Japanese) we find that it has agreeable properties, for instance the flaps are easy to move. But try with a rectangle: the result is less satisfactory. We examine the possibility of folding ‘good’ bird bases with polygons of various shapes. Afterwards we try a similar approach for the frog and the windmill bases. Cited in 1 Document MSC: 51M15 Geometric constructions in real or complex geometry 00A69 General applied mathematics Keywords:origami bases; polygons; frog; windmill PDFBibTeX XMLCite \textit{J. Justin}, Symmetry Cult. Sci. 5, No. 2, 153--165 (1994; Zbl 0884.51016)