Geodesic
Napoleon triangles
Matematičeskoe obrazovanie, Tome 86 (2018) no. 2, pp. 8-14.

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

An interesting and difficult geometric problem connected to Napoleon is considered.
Keywords: Napoleon I Bonaparte, the outer triangle of Napoleon, the inner triangle of Napoleon, the degenerate triangle of Napoleon. 
@article{MO_2018_86_2_a1,
     author = {V. B. Drozdov},
     title = {Napoleon triangles},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {8--14},
     publisher = {mathdoc},
     volume = {86},
     number = {2},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2018_86_2_a1/}
}
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V. B. Drozdov. Napoleon triangles. Matematičeskoe obrazovanie, Tome 86 (2018) no. 2, pp. 8-14. http://geodesic.mathdoc.fr/item/MO_2018_86_2_a1/