%@Auteur: François Meria\par
Il s'agit de construire la figure 2 ci-dessous. La figure 1
représente l'étape intermédiaire pour pouvoir construire la figure
2.

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\textbf{Programme de construction }\\

{\texttt{Toutes les constructions doivent se faire au COMPAS
et à la règle (sans utiliser les graduations sauf pour le rayon du cercle).}}\\

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\textbf{\'Etape 1.}\\
Construire un cercle $\mathcal{C}$ de centre $O$ et de rayon 10~cm. Et placer un point $A$ sur le cercle $\cal C$.\\

\textbf{\'Etape 2.}\\
À partir du point $A$, reporter le rayon sur le cercle de manière à construire l'hexagone régulier $ABCDEF$.\\

\textbf{\'Etape 3.}\\
Tracer les segments $[OA]$, $[OB]$, \ldots\\

\textbf{\'Etape 4.}\\
Construire les médiatrices des côtés du triangle $OAB$. Elles se coupent au point $I$.\\

\textbf{\'Etape 5.}\\
Tracer les segments $[IA]$, $[IB]$ et $[IO]$. On obtient la figure 1.\\

\textbf{\'Etape 6.}\\
Recommencer les étapes précédentes dans chacun des autres triangle équilatéraux tracés.\\

\textbf{\'Etape 7.}\\
Colorier de trois couleurs différentes afin d'obtenir la figure 2.\\

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