Optical Illusions

The cm2 are the same no matter how you place the blocks.

If you have to print it out and cut it up, thats sad. I did it within my head in about 20 seconds.

Well, you are wrong, so I suggest you try.

I seriously doubt that I am wrong.

But nevermind, post some new ones instead.

Gas: If you do print it out, and cut it up, the figures are the same size.

What do you call a square that is 6x6, and a square that is 5x7?

do you see wavy lines?

Well 5x7 wouldn´t be a square would it? Isn´t "square" = "kvadrat"?

yes, I (think I now) understand what you mean sphtman. but if you think it without numbers, It feels impossible to have exactly same area first filled fully, and in second pic there is mysterious "hole". so theoretically there must be one square less.. and still those blocks are similar..
ow my head..

Gas, square er bare en firkant Eller, det mener jeg da...

damn it, the small version gives it away

Quote:

Gas: If you do print it out, and cut it up, the figures are the same size.

Let me explain it this way: Build all the parts of triangle 1 in steel. Including the "outer" triangle to place the boxes in.
Now, you can´t place them different and have an empty square left!

@ ad_: delete it and use img tags

what Sphtman is saying is that the actual surface area has not changed, that is the same.
The position of the figures has only rearranged.
You mind is the one thinking that it is not possible.

how do i do that?

Here, I illustrated it for the few that don't get it. (Gaso)

<sarcasm> Yeah, I'm wrong. </sarcasm>

adrock: [.img] [/.img] Take the periods out though.

whoa, thanks waste but too much for me, how bout i link it

http://www.ebaumsworld.com/eyetest.html

first go to the webpage where you got that pic
now right click the image and choose properties
copy the pics url
now come back to WBW and type [IMG.]the pics url[/IMG.] without the dots (.)
click reply

Dudes, come on...