MATHEMATICS AND ORIGAMI

Mathematics and Origami

Once we know the co-ordinates of A, B, C, D, it is easy to obtain the length of BD and
AD:

BD= ()( )()xD−xB^2 + yD−yB^2 + zD−zB^2

AD= ()( )()xD−xA^2 + yD−yA^2 + zD−zA^2

Fig. 11 has the structure of a screw with four threads in it.

Interlude