Geodesic
Two notes on geometry
Matematičeskoe obrazovanie, Tome 100 (2021) no. 4, pp. 3-5.

Voir la notice de l'article provenant de la source Math-Net.Ru

The first note tells how the author, without planning this in advance, got an unobvious double geometric inequality. The second provides a short, simple, and easy-to-remember proof of Stewart's theorem. 
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V. B. Drozdov. Two notes on geometry. Matematičeskoe obrazovanie, Tome 100 (2021) no. 4, pp. 3-5. http://geodesic.mathdoc.fr/item/MO_2021_100_4_a1/