al., Springer (2003), pp. 461–488. Poinsot, L.; Memoire sur les polygones et polyèdres. J. de l'École Polytechnique 9 (1810), pp. 16–48. External links Regular Polygon description With interactive animation Incircle of a Regular Polygon With interactive animation Area of a Regular Polygon Three different formulae, with interactive animation Renaissance artists' constructions of regular polygons at Convergence Types of polygons