optical illusion

[glassmoon]

Wow, this is cool: http://www.grand-illusions.com/videos/dragon%20illusion.wmv
From: http://www.grand-illusions.com/

Another one:
http://www.grand-illusions.com/images/Dreieck.gif

Another link: Has anyone tried the Google GLAT test ?http://www.google.com/googleblog/2004/09/pencils-down-people.html

[Architectonic]

http://www.grand-illusions.com/ sure has some interesting stuff.... :)

[jyakulis]

Wow, this is cool: http://www.grand-illusions.com/videos/dragon%20illusion.wmv
From: http://www.grand-illusions.com/

Another one:
http://www.grand-illusions.com/images/Dreieck.gif

Another link: Has anyone tried the Google GLAT test ?http://www.google.com/googleblog/2004/09/pencils-down-people.html

Isn't there a slight curve to the upper hypotonuse? It would be just enough to account for the extra space I think....

[Architectonic]

Almost, they can't possibly be triangles, because they clearly aren't taking up the same amount of space. Just look along the "hypotenuse" and compare it with the grid.