60° Origami Modular

60° Origami Modular (Maria Sinayskaya)

rectangles (3:4), 10, 5 units, no glue

Some other rectangles can also be used with this folding sequence, but 3:4 is about optimal length, all things considered.

Here is a version from longer rectangles:

www.flickr.com/photos/goorigami/32863388415/

Done