Figure 8 Knot in Ribbon

Description

A flat ribbon can be tied in a figure 8 knot using only 60 degree folds. Here, green [zometool](http://zometool.com) struts form the centerline of the ribbon. Their length is one half of the width of the ribbon. The folds are all positioned as whole multiples of this length. [Another model of this same knot](https://skfb.ly/6QG7C) shows it pulled together as tightly as possible with the constraints as described. This model was generated with [vZome](http://vzome.com). The vZome file is included in the zip download of this model.