\documentclass{standalone}
\standaloneconfig{border=2mm 2mm 2mm 2mm}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}
\usetikzlibrary{calc}

\begin{document}

\begin{tikzpicture}[scale=1.00]
	\coordinate (A) at (0,1) ;
	\coordinate (B) at  (1,1) ;
	\coordinate (D) at  (1.5,-0.4) ;
	\coordinate (C) at (0,0) ;
	\draw[thick] (A) -- (B) -- (D) -- (C) --cycle;
	\draw[thin] (C) --(B);
	\draw[thick, red] ($(A)!0.15!(B)$) -- ++(-90:0.15) -- ++(180:0.15);
	\node[thick, font=\tiny, rotate=-30] at ($(A)!0.5!(B)$) {|};
	\node[thick, font=\tiny, rotate=45] at ($(A)!0.5!(C)$) {|};
	\node[thick, font=\tiny, rotate=-50] at ($(B)!0.45!(D)$) {||};
	\node[thick, font=\tiny, rotate=-30] at ($(C)!0.45!(D)$) {||};
	\node[thick, font=\tiny, rotate=30] at ($(B)!0.50!(C)$) {||};
	\begin{scriptsize}
		\node[above ] at (A) {$A$};
		\node[above ] at (B) {$B$};
		\node[ right] at (D) {$D$};
		\node[ below] at (C) {$C$};
	\end{scriptsize}
	\node[align=center, blue] at (1,2.5) {Calculer les coordonnées pour le milieu};
	\node[align=center, blue] at (1,2) {utiliser les coordonnée relatives avec des angles};
\end{tikzpicture}
\end{document}