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Friday, August 1, 2008

Why? Can you tell me?

Have you ever play wood block?
How about this?

3 comments:

Akira 思胜 said...

Interesting, but I donno how to solve also, haha...

WP said...

Oh yeah, I saw this optical illusion not long ago...I stared at it for quite some time before figuring it out! (was already writing on my blog to ask people the answer...:P )

The thing is, the two triangles (red and green) have diagonal sides that aren't parallel. The two triangles have slightly different proportions. As a result, the first large triangle is concave whereas the second is convex.

Hope this is enlightening! :)

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