Fold Reference Finding

To fold a model from crease pattern, one would need to locate the points where each fold starts and ends. This is called "reference finding". In this class, I will teach how to: 1) calculate the reference, 2) use the hourglass method to make rational division for boxpleated crease pattern, 3) generalize it to make irrational division for 22.5 crease pattern. The goal is to have participant understand how to make the creases from a crease pattern. We will have some exercises along the class, so please bring papers.

Knowledge prerequisite: basic geometry no harder than the properties of right triangle and congruency