neat illusion

[JellyWorld]

http://www.ebaumsworld.com/images/trigrid.gif

took me 15 minutes to figure it out

 

[dream431ca]

Ahhh...the wonders of mathematical craziness.

 

[bryanf445]

:S that makes my brain hurt

 

[Yuri]

I can't really figure it out.

 

[W4E]

isnt it obvious?

Spoiler

The height and width of the space the two peices fit into is swapped in the second one.

 

[Tr0n]

I can't really figure it out.

Neither can I.

 

[Shippi]

It's been a while since I've seen that.. I had it figured out once, I think

 

[Ennui]

argh I don't get it.

 

[Solaris]

Dubya tee eff???

 

[Ennui]

the bottom one does take up a bit more room on the grid (if you look at the slope lines) and probably enough for that one block.

I still don't get it though.

 

[ríomhaire]

What kind of God would alow this!

 

[JellyWorld]

They're both not really triangles, look at the red and green mini-triangles.

If the top and bottom were both triangles, then the ratio of sides of the red and green mini triangles would be the same but they're not (2:5, 3:8).
The top is a concave quadrilateral and the bottom is a convex quadrilateral (which is larger) thus the leftover square.

 

[BeaverMon]

The top is a concave quadrilateral and the bottom is a convex quadrilateral

......... Ok. Yeah. That makes sence.
/me wonders wtf is a "quadrilateral", then decides to not know.

 

[Vegeta897]

Concave means bending inward, convex means bending outward, and a quadrilateral is a shape with 4 sides and 4 angles.

I understand the illusion. I noticed the slight difference in shape but never wouldh have assumed that :O

 

[Ennui]

see, i figured it out but i didnt know why.

 

[Yuri]

see, i figured it out but i didnt know why.

Yeah, I wasn't paying attention to the slopes of the triangles, heh. It's quite obvious when you think of it, I guess.

And W4E, your explaination makes no sense whatsoever.

 

[2Fast4U]

Took me 15 seconds to figure it out. What's the point of this anyway?

 

[xcellerate]

i dont understand why...its so obvious. Seriously? 15 minutes?

 

[Yuri]

Wow, you guys are so smart!

You could use to learn some manners and not mock others maybe Sometimes people just don't get things, even if they seem obvious, just cuz its something you don't normally think about. I found it interesting. So **** off.

 

[qckbeam]

Erestheux, your avatar, it's hot!

 

[Yuri]

Erestheux, your avatar, it's hot!

Why thank you; I've been waiting for someone to mention it!

not as hot as you, qckie

 

[outpost]

Or Me!!! Lawls!

 

[SpuD]

I got it within a minute

 

[Ev!lP!e]

lol. took my about 45 seconds to figure, but i can see why people would get confused, you just have to look at the shapes closely.

 

[15357]

I learned that in school a few years ago.

 

[Pesmerga]

You guys are dumbasses :|

 

[Yuri]

You guys are dumbasses :|

But you're an asshole, so it evens out.

 

[<RJMC>]

and why is this a illusion?

 

[venturon]

Try finding a picture of it without the grid.

 

[Parrot of doom]

Get a ruler or straight object. Line it up on your screen with the longest side of the 'triangle'. Now do the same with the other one. You'll notice that the upper shape doesn't have a straight edge.

Its nothing to do with maths, its an optical illusion.

 

[Shamrock]

isnt it obvious?

Spoiler

The height and width of the space the two peices fit into is swapped in the second one.

That is very obvious.. All they did was move the shapes and what not.. Its pretty simple. I wouldn't consider it an illusion at all..