%This document can be run standalone if few comments
%are removed (or added). This is useful to check and modify the drawing.
%
%
%The document accept one parameter whose value is "pstricks", "tikz", "inclusion"
%to define if the drawing is made with ps-tricks, tikz or simply
%by the inclusion of an external file.
%\documentclass[tikz]{article}
\savebox\AngleBox{%
\begin{tikzpicture}
%Coordinates of the angle
\coordinate (O) at (0,0);
\coordinate (B) at (\anglebase,0);
\coordinate (C) at (2.0479,1.4339); %2.5*cos(35),2.5*sin(35)
%Position do place the letter Theta for marking the angle
\coordinate (Theta) at (.4296cm,.2cm);
%Position where to place the label "l_2"
\coordinate (L2Label) at (1.1cm,0.58cm);
%Position of the centre of the circle indicating point x1,y1 and y2,y2
\coordinate (XOne) at (\anglebase+\PointRadius,0);
\coordinate (XTwo) at (\anglebase+\PointRadius,0);
%
%Draw the base of the angle
\draw [thick] (O) -- (B) node[midway,below] {$\ell_1$};
%Draw the angle
\draw [thick] (O) -- (\ThetaAngle:\angleside);
%Draw the small circle at the end of the angle to mark the point X1,y1 and x2,y2
\draw (O) node{$\circ$};
\draw (B) node{$\circ$};
\draw (C) node{$\circ$};
%Draw the angle mark
\draw (.20\anglebase,0) arc(0:\ThetaAngle:.20\anglebase);
%Put the letter for the angle and the 3 points of the angle.
\draw (Theta) node[right]{$\theta$};
\draw (O) node[below,left]{$(0,0)$};
\draw (B) node[below,right]{$(x_1,y_1)$};
\draw (C) node[below,right]{$(x_2,y_2)$};
\draw (L2Label) node[below,right] {$\ell_2$};
\end{tikzpicture}
}
\or
%Inclusion
\relax
\else
\relax
\fi
%Finally, the draw is typeset
%\begin{center}
% \usebox\AngleBox
%\end{center}
%\end{document}
