Geodesic
Directed angles and isogonality
Matematičeskoe obrazovanie, Tome 109 (2024) no. 1, pp. 2-11.

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

The article continues the topic of using directed angles in the proofs of some planimetry theorems, considered by the author in previous articles. In particular, several statements related to isogonality have been proven using directed angles. 
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A. N. Afanasyev. Directed angles and isogonality. Matematičeskoe obrazovanie, Tome 109 (2024) no. 1, pp. 2-11. http://geodesic.mathdoc.fr/item/MO_2024_109_1_a0/

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