\ANG{
Untersuche, ob man aus den angegebenen Beziehungen auf die
"Ahnlichkeit der Dreiecke $ABC$ und $RST$ schlie"sen kann. 
Wenn ja, gib den entsprechenden "Ahnlichkeitssatz an.

\begin{minipage}[t]{5cm}
\begin{enumerate}
\item
$\D b:c = s : r, \quad \alpha = \tau$
\item
$\D \alpha = \rho, \quad \beta = \tau$
\end{enumerate}
\end{minipage}
\hspace{1cm}
\mbox{
\beginpicture
\setcoordinatesystem units <1mm,1mm> point at 0 35
\unitlength1mm
\plot 0 0 20 0 12.68 12.68 0 0 /
\put {$A$} [tr] <-0.5mm,-0.5mm> at 0 0
\put {$B$} [tl] <0.5mm,-0.5mm> at 20 0
\put {$C$} [B] <0mm,0.5mm> at 12.68 12.68
\circulararc 45 degrees from 6 0 center at 0 0
\put {$\alpha$} [Bl] <3mm,1mm> at 0 0
\circulararc -60 degrees from 14 0 center at 20 0 
\put {$\beta$} [Br] <-2mm,1mm> at 20 0
\circulararc 75 degrees from 8.437 8.437 center at 12.68 12.68
\put {$\gamma$} [t] <-0.5mm,-2mm> at 12.68 12.68
\put {$c$} [t] <0mm,-1mm> at 10 0
\put {$a$} [Bl] <1mm,0mm> at 16.34 6.339
\put {$b$} [Br] <-1mm,0mm> at 6.339 6.339
\put{\beginpicture
\setcoordinatesystem units <1mm,1mm> 
\unitlength1mm
\plot 0 0 20 0 12.68 12.68 0 0 /
\put {$R$} [tr] <-0.5mm,-0.5mm> at 0 0
\put {$S$} [tl] <0.5mm,-0.5mm> at 20 0
\put {$T$} [B] <0mm,0.5mm> at 12.68 12.68
\circulararc 45 degrees from 6 0 center at 0 0
\put {$\rho$} [Bl] <3mm,1.2mm> at 0 0
\circulararc -60 degrees from 14 0 center at 20 0 
\put {$\sigma$} [Br] <-2mm,1mm> at 20 0
\circulararc 75 degrees from 8.437 8.437 center at 12.68 12.68
\put {$\tau$} [t] <-0.5mm,-2mm> at 12.68 12.68
\put {$t$} [t] <0mm,-1mm> at 10 0
\put {$r$} [Bl] <1mm,0mm> at 16.34 6.339
\put {$s$} [Br] <-1mm,0mm> at 6.339 6.339
\endpicture} at 50 5
\endpicture}
}
\LSG{
\begin{enumerate}
\item
Die Dreiecke sind nach dem S:W:S-Satz zueinander ähnlich.
\item
Die Dreiecke sind nach dem WWW-Satz zueinander ähnlich.
\end{enumerate}
}
