\ANG{
% 9/Geometrie/Strahlensatz 
%%\item
Berechne jeweils $x$, $y$ und $z$:\\[2mm]
(a)
\raisebox{-28mm}{\parbox[t]{4.2cm}{
\begin {scriptsize}
\unitlength=1mm
\beginpicture 
\setcoordinatesystem units <1mm,1mm> 
\setplotarea x from -5 to 35, y from 0 to 30 
\inboundscheckon 
\setlinear 
\plot -4 11  30 2.5 /  
\plot -4 8  30 25 /  
\plot 25 0  30 30 /  
\plot 12.5 5  15 20 /  
\put {$8$} at 7.5 16 
\put {$4$} at 21 23 
\put {$3$} at 15.5 12 
\put {$y$} at 29 13 
\put {$x$} at 20 7 
\put {$z$} at 8 9.5 
\put {$A$} at 0 12 
\put {$B$} at 27 1 
\put {$|\overline{AB}|=10$} at 10 2 
\endpicture 
\end {scriptsize} }}
\qquad (b)
\raisebox{-28mm}{\parbox[t]{4.2cm}{
\begin {scriptsize}
\unitlength=1mm
\beginpicture 
\setcoordinatesystem units <1mm,1mm> 
\setplotarea x from 0 to 40, y from 0 to 30 
\inboundscheckon 
\setlinear 
\plot 16 30  40 0 /  
\plot 23 30  5 0 /  
\plot 10 15  30 13 /  
\plot 5 5  40 1.5 /  
\put {$3$} at 27 20 
\put {$4$} at 15 20 
\put {$5$} at 22 1 
\put {$6$} at 9 10 
\put {$y$} at 21 11 
\put {$z$} at 35.5 9 
\put {$A$} at 22 25 
\put {$B$} at 39.5 4 
\put {$x=|\overline{AB}|$} at 32 25 
\endpicture 
\end {scriptsize} }}

}
\LSG{ 
(a) $\D x=\frac{10}{3}\,,\quad y=4,5\,,\quad z=\frac{20}{3}$\qquad 
(b) $x=7,5\,,\quad y=2\,,\quad z=4,5$
}
