Dissections - Haberdasher's puzzle
A [color=#c51414]dissection [/color]example, the Haberdasher's puzzle, proposed in 1902 by Henry Dudeney, that transforms an [color=#1551b5]equilateral triangle[/color] into an [color=#1551b5]equivalent square[/color].
Step-by-step construction of the dissection
Information: Dissections - Haberdasher's puzzle