Merci d'avance.
Code : Tout sélectionner
\documentclass[10pt]{article}
\usepackage{tikz}
\usetikzlibrary{decorations.markings}
\usetikzlibrary{patterns}
\begin{document}
\begin{tikzpicture}
\filldraw (0,0) circle (1.5pt) node[left] {$A$};
\filldraw (3,2) circle (1.5pt) node[above] {$B$};
\filldraw (4,0) circle (1.5pt) node[below] {$C$};
\draw (2.5,1) node[below] {$P$};
\draw(0,0)-- (4,0);
\draw (3,2)--(4,0);
\draw (3,2)--(0,0);
\draw (2.5,1) -- (4,0);
\draw (2.5,1) -- node[midway] {$\Vert$} (3,2);
\draw (2.5,1) -- node[midway] {$\vert$} (0,0);
\draw[rotate=60] (0,0)--(3,2);
\draw[rotate=60] (3,2) --node[midway] {$\Vert$} (2.5,1);
\draw[rotate=60] (0,0) -- node[midway] {$-$} (2.5,1);
\draw (-0.8,4) node[below] {$C'$};
\draw (0.8,2.2) node[below] {$P'$};
\draw (0.38,2.67) -- node[midway] {$\vert$} (2.5,1);
\end{tikzpicture}
\end{document}