Geodesic
Srdce trojúhelníku
Rozhledy matematicko-fyzikální, Tome 88 (2013) no. 1, pp. 4-9 
Dlab, Vlastimil. Srdce trojúhelníku. Rozhledy matematicko-fyzikální, Tome 88 (2013) no. 1, pp. 4-9. http://geodesic.mathdoc.fr/item/RMF_2013_88_1_a1/
@article{RMF_2013_88_1_a1,
     author = {Dlab, Vlastimil},
     title = {Srdce troj\'uheln{\'\i}ku},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {4--9},
     year = {2013},
     volume = {88},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/RMF_2013_88_1_a1/}
}
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AU  - Dlab, Vlastimil
TI  - Srdce trojúhelníku
JO  - Rozhledy matematicko-fyzikální
PY  - 2013
SP  - 4
EP  - 9
VL  - 88
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/RMF_2013_88_1_a1/
LA  - cs
ID  - RMF_2013_88_1_a1
ER  - 
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%A Dlab, Vlastimil
%T Srdce trojúhelníku
%J Rozhledy matematicko-fyzikální
%D 2013
%P 4-9
%V 88
%N 1
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%G cs
%F RMF_2013_88_1_a1

Voir la notice de l'article provenant de la source Czech Digital Mathematics Library

The article assigns, in a unique way, to every triangle a similar triangle placed inside it. Its area is equal to $1/400$th of the area of the original triangle. The constructed triangle is called “the heart of a given triangle”.
The article assigns, in a unique way, to every triangle a similar triangle placed inside it. Its area is equal to $1/400$th of the area of the original triangle. The constructed triangle is called “the heart of a given triangle”.