All of the above three couldbe built in real-life if you imagine the left arm as a box that's open.
The first has the fold go behind the end.
The second has a clear end.
The third has no end.
Escher's couldn't be built.
(The first has the fold go behind the end.
The second has a clear end.
The third has no end.
Escher's couldn't be built.
Father_Ted Drink!,
Fri 16 Sep 2005, 14:46,
archived)