Geodesic
Concurrency in Hexagons -- A Trigonometric Tale
Journal for geometry and graphics, Tome 22 (2018) no. 1, pp. 21-29.

Voir la notice de l'article provenant de la source Heldermann Verlag

It is shown that the concurrency of the main diagonals in a hexagon is equivalent to a nine-angle sine trigonometric identity. Applications and generalizations to hexagonal paths are also discussed.
Classification : 51M04, 97G60, 51A20
Mots-clés : Hexagon, main diagonals, concurrency, collinearity, cross ratio, sine-theorems 
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     author = {N. Anghel },
     title = {Concurrency in {Hexagons} -- {A} {Trigonometric} {Tale}},
     journal = {Journal for geometry and graphics},
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     number = {1},
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}
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N. Anghel . Concurrency in Hexagons -- A Trigonometric Tale. Journal for geometry and graphics, Tome 22 (2018) no. 1, pp. 21-29. http://geodesic.mathdoc.fr/item/JGG_2018_22_1_JGG_2018_22_1_a2/