Square⇔hexagon Dissection

The dissection can be found on p.18 of the book Recreational problems in geometric dissections …, and HAKMEM, Item 85 (see e.g. here) seems to attribute its origin to Scientific American, Nov. 1961, p.164.
There are at least three other five-piece square⇔hexagon dissections known: those of Busschop and of Theobald, and the one found also on p.18 of the above book.

Use the slider at the top left of the picture to see how the actual cuts can be varied.

Other Web pages related to dissections:
    http://www.cs.purdue.edu/homes/gnf/book/webdiss.html
    http://home.btconnect.com/GavinTheobald/Index.html
    http://www.johnrausch.com/PuzzlingWorld
    http://www.ics.uci.edu/~eppstein/junkyard/dissect.html
    http://demonstrations.wolfram.com/search.html?query=dissections
    http://www.tessellations.com

Boyko Bantchev, Created with GeoGebra