Divide the quadrilaterals into a rectangle and a triangle. The triangles have slope 5/2 whereas the larger triangles have slope 8/3. Therefore you cannot actually form a big rectangle with the dimensions you are attempting to using these four pieces. What seems to be a rectangle is really a five-sided polygon.

Look george, I can make shapes! Duuuuhhhhh!!!

it isnt reallly a square but it has 5 sides

5stars

61003 and cr17cr17 are right.
the slopes of the pairs of triangles are 5/2 and 8/3 .
So the last "rectangle" is not perfect.

its now a rectangle not a square so thats one less square!

http://www.metacafe.com/watch/461944/bigfoot_sasquatch_sasquach_sighting/

http://www.metacafe.com/watch/441990/cool_math_trick/

VERY hard to notice, but that one square is formed by taking a bit of the ENTIRE diagonal, used also to creat a one square missing "paradox" (notice the " "), nice tho!

at 5 seconds look closely at the long triangles. there is a hidden square tiny instsy bitsy of square

.

Some of the squares in the rectangle are partial squares, therefore you gain one square. There are not 25 full squares. Not a trick, just an illusion.

go and buy a cheap one that has 65 insted of 64

HA HA ! very easy!

hypotenuse

Hey dude. This shape did not match at all after readjusting. There is a gap between those line on a rematch. No need calculation to try this. U just need to draw it back using AutoCAD or something and try to readjusting. An you will know what im trying to say. Yeah, nice trick. Engineers failed! Architech and Town Planner rules!! This is art!!

slope= rise over run...you do the slopey popey and you turn yourself around!

you picked up squares by cutting them the way you did

what a .... I see only 45 squares, dudes :) 13*5 = 45

8*8=64
13*5=65
No mystery... Where does the "extra" square come from??? There is no "extra" square, just "optimization" of a rectangle...

I don't get it. Is it made of paper, or some special UFO material?

don worry friendzzz even maths have learned to cheat us publically.dats y we dont get gooood marks of it.

ya ur right..it does

good trick for poor sight

see wen u start u r give 64 squares (8x8), but those 64 squares make 1 outer square..inside which the 64 squares are there, therefore there are 65 squares.. tht outer square u break up to form a rectangle(which is not a square) of 13x5 tht is 65 ..therefore it remains as 65 squares..

if you calculate the sides using Pitagoras' rule (A^2+b^2=c^2) it doesn't add up prefectly, actually making this some kind of polygon.

solution is simple... 13/5 =! 8/3 and when this statement be true ... then you will too jajajaja

NOTE THE ANGLE

in the first square u have both side of 8 squares in which the area would be 8x8=64

in the second scquare there was a rectangle formed of dimension 13 and 5 and so 13x5=65

this is the easy way to explan it there is another way according to the angles and the area of each part

They are correct about the angles not matching. See http://tinyurl.com/v5co8 for a more accurate view of the assembled pieces. There is actually a narrow parallelogram in the middle where the four pieces do not meet. Can you guess the area of the parallelogram? You got it...1 sq. in.

you see the new shape as a regtangle made up of 2 big triangle, actually if you calculate, one of the triangle is a polygon and not a perfect triangle. therefore there are gaps inbetween and the area increase

good one

Try to visualize mathe here folks - pythagorean theorem....

another basic maths trick..somehow, its like how ppl does magic show..

Two of the halves made an extra square. Or either that there is another more sophistacated geometry theory behind this. But what do you know there are 64 squares like that of chess and this guy probably figured it out by folding a transparent chess mat or something. Or something else but I am only 14 years old and I curse the man (or woman) that invented cheese as in this is really cheesy.

How does that work?

for the post. I am going to try it and show my kids.

Cool intro. Thanks I enjoy watching your video's. Keep them coming.

..........that was a waste of time

at the end theres 65 squares...

(12*54*42) / 5+34-55
12-14 / 9*3+2

simple...

So, where's all the fishin videos? Big daddy cat? Trout is for the birds though.

I'd say it's an Illusion.

look at the slope of the diagonal-- that is, the hyp of the triangle. one of them is up 1 over 5 or slope = 1/5 and the other is up 3 over 8 or slope = 3/8. Those shapes do not fit together as arranged because they have different slope and so they do not form the basic shape that it appears to be.

... is really a SIX-sided polygon. Cheers.

http://www.metacafe.com/watch/526271/if_you_are_intelligent_click_here/

You should really check this out it's new http://www.metacafe.com/watch/440644/hard_multiplication_made_easy/

This is basic math! If you have a room that measures 10 ft x 10ft = 100 sq ft!

If you change the basic structure but not the total of the sides to you have a room that is(10ft-2ft) 8ft x (10ft 2ft) 12ft = 96 sq ft

This video show just that example!

repeat... again.

those explanations are pathetically worthless. What kind of crap is that? Its a fuckin miracle, plain and simple. Whats really amazing is how retarded the hands are trying to line up the pieces. What a bumbling boob.