\input{preamble-standalone.ltx}
\begin{document}

% Ex. No. 125 (Section 19.1.8 : Spieker circle)

\begin{tikzpicture}[scale=1]
  \tkzDefPoints{ 0/0/A,4/0/B,0.8/4/C}
   \tkzDefSpcTriangle[medial](A,B,C){Ma,Mb,Mc}
   \tkzDefTriangleCenter[spieker](A,B,C)
   \tkzGetPoint{Sp}
   \tkzDrawPolygon[blue](A,B,C)
   \tkzDrawPolygon[red](Ma,Mb,Mc)
   \tkzDrawPoints[blue](B,C,A)
   \tkzDrawPoints[red](Ma,Mb,Mc,Sp)
   \tkzDrawCircle[in,red](Ma,Mb,Mc)
   \tkzAutoLabelPoints[center=Sp,dist=.3](Ma,Mb,Mc)
   \tkzLabelPoints[blue,right](Sp)
   \tkzAutoLabelPoints[center=Sp](A,B,C)
\end{tikzpicture}

\end{document}
