\ANG{
\begin{minipage}[t]{8cm}
In der nebenstehenden, nicht ma"s\-stabs\-ge\-treuen Figur sind bekannt:\\
$h = 6,0\, \rm cm$ und $p = 18,0\, \rm cm$.\\
Berechne q, b, s und r.
\end{minipage}
\hfill
\begin{minipage}[t]{6cm}
\makebox[0cm]{}\\[-7mm]
\beginpicture

\setcoordinatesystem units <1mm,1mm> point at 0 0
\setplotarea x from -5 to 55, y from -8 to 40
\unitlength1mm

\setlinear
\plot 0 0 50 0 0 30 0 0 /
\plot 0 0 15 21 15 0 /

\put {A} at -2 -2
\put {B} at 51 -2
\put {C} at 16 23
\put {D} at 0 33
\put {a} at 32.5 14
\put {b} at 7 14
\put {c} at 25 -2
\put {h} at 17 11
\put {p} at 32 2
\put {q} at 7 2
\put {r} at -2 16
\put {s} at 8 28

\circulararc 90 degrees from 5 0 center at 0 0
\circulararc 90 degrees from 20 0 center at 15 0
\circulararc -90 degrees from 19 18.6 center at 15 21

\put {\circle*{1}} at 2.5 2.5
\put {\circle*{1}} at 17.5 2.5
\put {\circle*{1}} at 16 19

\endpicture
\end{minipage}
}
\LSG{ 
$q=2,0\, \rm cm$; $b \approx 6,3\, \rm cm$; $s \approx 2,1\, \rm cm$; 
                  $r \approx 6,7\, \rm cm$ }