Geodesic
A Geometric Approach to the Indication of Rectangular Tria
Matematičeskoe obrazovanie, Tome 42 (2007) no. 2, pp. 61-62.

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

The author suggests a more geometric proof of the indication of rectangular triangle than that provided in the issue 1(36), 2006. 
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     author = {B. R. Frenkin},
     title = {A {Geometric} {Approach} to the {Indication} of {Rectangular} {Tria}},
     journal = {Matemati\v{c}eskoe obrazovanie},
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B. R. Frenkin. A Geometric Approach to the Indication of Rectangular Tria. Matematičeskoe obrazovanie, Tome 42 (2007) no. 2, pp. 61-62. http://geodesic.mathdoc.fr/item/MO_2007_42_2_a7/