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 !

ANGLE TRISECTION

The so-called THALES method used by the companions (historical craftsmen).

Let AÔB be an angle

Create a circle centered at O radius OB diameter CB

Create an arc of circle centered at B radius BC

Create an arc of circle centered at C radius CB

These arcs cross at D

Draw AD that crosses OB at E

On any straight line trace 3 equal segments EG, GH, HI

Draw BI and parallels to BI passing through H and G and crossing EB at J and K

Draw DJ and DK crossing the circle centered at O at N and M

The arcs BM, MN and NA are equals

So AÔN = NÔM = MÔB

Following page: the nonagon drawing

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