Le silence a régné dans la cour du château en 2020 en raison des contraintes sanitaires.
Espérons que la fête de Mézerville aura lieu en 2021 et que l’Association NAMUKA pourra nous proposer un spectacle !

DIAGRAM OF A HEPTAGON

Approximate method – 7 angles of 51°,42 (companions)

The angle at the heptagon’s centre is equal to
360°/7 = 51°,42

The heptagon side GH is equal to the radius OH * 2 sin (51°,42/2)

If the radius =1, sin (51°,42/2) = 0,4338 -> GH = 0,867

On the same circle create the equilateral triangle ABC

We notice that BD = radius * cos 30°, or, radius * sin 60°, or sin 60° = cos 30° = 0,866 = BD

The half side of the inscribed equilateral triangle is a very approximate value of the side of the inscribed heptagon in the same circle.

Following page : the angle trisection

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