Here are schematics (left) and photos (right) of the first four steps in forming a back fold.
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By superimposing the schematics, it is easy to see that in the limit the back folds converge to the line of length sqrt(2).
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This is clear, but on closer inspection leads to an observation that may seem paradoxical:
step | number of segments | length/segment | back fold length |
1 | 2 | 1 | 2 |
2 | 4 | 1/2 | 2 |
3 | 8 | 1/4 | 2 |
4 | 16 | 1/8 | 2 |
n | 2n | 1/2n-1 | 2 |
We have a sequence of broken lines, each having length 2, converging to a line of length sqrt(2). What does this suggest to you?
Return to Length of the Cuts.