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arXiv · 2601.15591

A Wild Steiner-Lehmus Chase

Eric L. Grinberg·Mehmet Z. Orhon
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Abstract

We present a proof the Steiner-Lehmus equal bisectors theorem by applying the Law of sines in rapid succession to a side-by-side comparison. For nearly two centuries, the quest for a direct proof has sustained interest in proving and reproving this theorem. We suggest that a second driving force may also be at play.

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Eric L. Grinberg, Mehmet Z. Orhon. 2026-01-22. A Wild Steiner-Lehmus Chase. https://doi.org/10.1080/00255572.2025.2594896

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