%%
%% The LaTeX Companion, 3ed
%%
%% Example 8-5-6 on page I-636 in "Basic objects".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{171.0pt}

%StartShownPreambleCommands
\usepackage{tikz}
%StopShownPreambleCommands

\begin{document}
\begin{tikzpicture}[line width=10pt]
\draw (0,0) -- (1,1) -- (1,0) -- (0,0);
\draw (2,0) -- (3,1) -- (3,0) -- cycle;
\end{tikzpicture}
\end{document}