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Corde à treize nœuds ou cordes des druides

Corde à treize nœuds ou cordes des druides. 5. 3. Triangle rectangle (tracé de la perpendiculaire) Rapport 5/3 = 1,66. 4. 1. 2. 1 + 2 = 3. 3. 2. 3 + 2 = 4. 4 + 3 = 5. 1 = 1 cm 2 = 1, 618 cm = 1, 618 = (1, 618) 1 3 = 2, 618 cm = 1, 618 x 1, 618 = (1, 618) 2

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Corde à treize nœuds ou cordes des druides

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  1. Corde à treize nœuds ou cordes des druides 5 3 Triangle rectangle (tracé de la perpendiculaire) Rapport 5/3 = 1,66 4

  2. 1 2 1 + 2 = 3 3 2 3 + 2 = 4 4 + 3 = 5 1 = 1 cm 2 = 1, 618 cm = 1, 618 = (1, 618)1 3 = 2, 618 cm = 1, 618 x 1, 618 = (1, 618)2 4 = 4, 236 cm = 2, 618 x 1, 618 = (1, 618)3 5 = 7, 854 cm = 4, 236 x 1, 618 = (1, 618)4 Chaque élément de la suite est la somme des deux précédents termes (suite arithmétique type Funabaci), ou encore le produit du terme précédent par 1, 618 (suite géométrique). 1,618 est le seul nombre à engendrer la divine proportion et une suite géométrique réalisable par dessin, sans calcul.

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