Geodesic
Generalization of the concept of centroid in solving stereometric problems
Matematičeskoe obrazovanie, Tome 104 (2022) no. 4, pp. 26-27.

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

The note considers the concept of the centroid of a system of points in space (for points with the same unit mass) and gives examples of solving stereometric problems using this concept. 
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     author = {S. V. Zharov},
     title = {Generalization of the concept of centroid in solving stereometric problems},
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S. V. Zharov. Generalization of the concept of centroid in solving stereometric problems. Matematičeskoe obrazovanie, Tome 104 (2022) no. 4, pp. 26-27. http://geodesic.mathdoc.fr/item/MO_2022_104_4_a3/

[1] S. B. Gashkov, Tsentry tyazhesti i geometriya, MTsNMO, M., 2015, 64 pp.

[2] A. M. Lopshits, Analiticheskaya geometriya, Uchpedgiz, M., 1948, 588 pp.