Can you fold a square sheet of paper into three equal rectangles, without using anything but folding?
(That is, you are not allowed to use anything but your hands, and you cannot do anything but folding... everything else is forbidden!)
(In reply to
Perhaps easier to understand... by Sing4TheDay)
Now fold CD up so that C is at F and fold AB down creasing at the new location of CD (DF) to get your three rectanlges.
Here's a crude ascii drawing of the folds. The aspect ration isn't quite square but you should get the idea.
A+------------+B
| /|
| / |
| / |
|________/ -|F
| / - |
| / -- |
| / - -|E
|____/ - -- |
| /-- -- |
| /- -- |
| /--- |
|/-- |
D+------------+C
re: Oops, forgot last step. Also added a crude ascii picture
