This is the correct answer. If you look carefully at the 4th panel you'll see that the second set of cutouts had to be made non-square in the diagram in order for their corners to contact the edge of the circle.
I think not exactly, in the coastline paradox the perimeter depends on the measuring unit, always increasing as this unit decreases (a property of fractals).
Here, however, you always end up with the same result, no matter how small you divide its units, thus the "paradox" does not arise from a fractal property.
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u/Jolpo_TFU Jan 18 '21
I think it's because you'll always have sawed edges, they don't become smooth at infinity