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#3
08-20-2004, 17:39
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I saw this ages ago. Explanation is, that "rectangle" that comes out after rearranging pieces is not really a rectangle (diagonal is not a line, but consists of 2 lines). It can be proven by calculating internal angles. So actually the "diagonal" has an empty space with field = 1.
If you like optical illusions, take a look at 212.33.90.248/~omega/rotsnake.gif |
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