Masami Isoda

A POINT OPENS THE DOOR TO ORIGAMICS

As the students make their first fold, call their attention to all the first folds. The objects the students plan to make may vary flower, animal or whatever. But no matter what they are trying to make, their first fold is invariably one of these types: a book fold (or side-bisector fold) made by placing one side on the opposite side and making a crease as in Fig.1.1(a), or a diagonal fold made by placing a vertex on the opposite vertex and making a crease as in Fig.1.1(b). In the book fold two opposite sides are bisected, hence the alternate name.