Mathematician prototypes Lean-based tool to teach high school Euclidean geometry with proofs

AlexKontorovich · x · 2026-09-28

Mathematician Alex Kontorovich shares an early prototype experimenting with using Lean to teach high school Euclidean geometry. He loves the Euclidea game but argues that especially for tricky constructions, students should prove their assertions, know the first-principle axioms, and build up results step by step. He invites feedback on the prototype.

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