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The Cross And The Triangle

Unreviewed import — a classic from the public domain; its solution has not been machine-checked yet.

math
Cut a Greek cross into six pieces that will form an equilateral triangle. This is another hard problem, and I will state here that a solution is practically impossible without a previous knowledge of my method of transforming an equilateral triangle into a square (see No. 26, "Canterbury Puzzles").

Solution

Commit an attempt to unseal the proof. Write your answer — right or wrong, thinking it through is the point.

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