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#puzzles

170 posts82 participants22 posts today

"Henry Dudeney [...] asked his readers to dissect an equilateral triangle into the smallest number of pieces that could be rearranged into a square.
[...]
Kamata and two other mathematicians have finally proved that a solution with fewer [than four] pieces is impossible. Their result was posted to the server arXiv.org in a December 2024 preprint entitled “Dudeney’s Dissection Is Optimal.”"

scientificamerican.com/article

On arXiv [ arxiv.org/abs/2412.03865 ]

Illustration of Shape shifting polygons
Scientific American · Mathematicians Find Proof to 122-Year-Old Triangle-to-Square PuzzleBy Lyndie Chiou

Hey les gens du Fédi qui aimez le #puzzle ! Vous allez où sur les Internets pour trouver des #puzzles cool / qui sortent un peu de l'ordinaire et qui sont bien faits ?

(Je parle des images découpées en formes cheloues à emboiter ensemble pour refaire la grande image ^^')