%% 
%%  A DANTE-Edition example
%% 
%%  Example 16-04-26 on page 251.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{153.70511pt}

\usepackage{pstricks,pst-node,textcomp}
\SpecialCoor

\begin{document}
\begin{pspicture}(-0.5,0)(3,3) \large\bfseries
  \psset{nodesep=3pt,linearc=0.3}
  \rput[bl](0,0){\rnode{A}{1}}
  \rput[tr](3,3){\rnode{B}{2}}
  \ncarcbox[arcangle=30]{A}{B}
  \pcline[linestyle=dashed](A)(B)
  \pcline[linestyle=dashed,nodesepB=-0.2](A)(3,0.8)
  \psarc{<->}(0,0){3.25}{15}{45}
  \rput(2.2,1.5){$30^\circ$}
  \pnode(0,3){A}\pnode(3,0){B}
  \ncarcbox*[border=4pt,linecolor=lightgray,
    arcangle=45]{A}{B}
  \rput[lt](A){3}\rput[rb](B){4}
\end{pspicture}
\end{document}
