def on_AddNPolygonButton_clicked(self, widget):
N = int(Gtk.Entry.get_text(self.NSidesEntry))
Radius = float(Gtk.Entry.get_text(self.NRadiusEntry))
Center = tuple(map(int, Gtk.Entry.get_text(self.NCenterEntry).split(",")))
Angle = float(Gtk.Entry.get_text(self.NAngleEntry))
Polygon = Geometry.n_Sided_Polygon(N, Radius, Center, Angle)
self.Shapes.append(Polygon)
