[allan40alt]

It's got me stumped:

http://www.youtube.com/watch_popup?feature=player_embedded&v=3PszMaZ5Ipk



Al.

 

[Mac2008]

Mac.

 

[Dan]

Cool I like that! Called the missing square puzzle I think:http://en.wikipedia.org/wiki/Missing_square_puzzle

 

[Pugmania]

Thanks for the link Dan it tells you how it's done, saved me working it out.

???????????????

 

[Dan]

I'll be honest it didn't help me a great deal!

 

[Mac2008]

Got it, the area of the long bent side with a straight straight edge between the two ends is equal to one square.Er I think.

 

[allan40alt]

I think I was better off not seeing the answer!