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%%
%% The LaTeX Companion, 3ed
%%
%% Example 8-5-2 on page I-634 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{75.0pt}
\usepackage{pgf}\pgfmathsetseed{200}
%StartShownPreambleCommands
\usepackage{tikz}
%StopShownPreambleCommands
\begin{document}
\begin{tikzpicture}[baseline={(0,-1.5)}]
\draw (0,0) circle[radius=1];
\draw[blue,thick] (0,0) -- ({sqrt(2)/2},0)--({sqrt(2)/2},{sqrt(2)/2});
\draw[dashed] (rand,rand)-- (rand,rand) -- (rand,rand)--cycle;
\draw[dotted] (rand,rand)-- (rand,rand) -- (rand,rand)--cycle;
\end{tikzpicture}
\par\Huge \tikz[baseline={(0,0)}]\draw[<->]
(0,-{depth("y")+0pt}) -- (0,{height("T")+0pt}); Type
\end{document}
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