% !TeX TXS-program:compile = txs:///pdflatex

\documentclass[margin=5mm]{standalone}
\usepackage{tkz-grapheur}
\usetikzlibrary{hobby}

\begin{document}

\begin{tikzpicture}[x=0.6cm,y=0.6cm]
	\draw[thick] (0,0)--(5,0)--(5,5)--(0,5)--cycle ;
	\draw[thick] (5,0)--(6.5,1.8)--(6.5,6.8)--(5,5)--cycle;
	\draw[thick] (0,5)--(1.5,6.8)--(6.5,6.8);
	\draw[thick,dashed] (0,0)--(1.5,1.8)--(6.5,1.8) (1.5,1.8)--(1.5,6.8);
	\draw[thick,densely dotted] (5,5)--(10,5) ;
	\foreach \Point/\Name/\Pos in {(0,0)/A/below left,(5,0)/B/below right,(6.5,1.8)/C/above right,(1.5,1.8)/D/above right,(0,5)/E/above left,(5,5)/F/above left,(6.5,6.8)/G/above right,(1.5,6.8)/H/above right,(2.5,5)/I/above right,(10,5)/J/above right}
	\filldraw \Point circle(2pt) node[\Pos] {\Name} ;
\end{tikzpicture}

\end{document}