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

% Ex. No. 119 (Section 16.0.4 : Option \tkzname{intouch})

\begin{tikzpicture}[scale=.75]
 \tkzDefPoints{0/0/A,6/0/B,0.8/4/C}
 \tkzDefSpcTriangle[intouch,name=X](A,B,C){_a,_b,_c}
 \tkzInCenter(A,B,C)\tkzGetPoint{I}
 \tkzDrawPolygon[red](A,B,C)
 \tkzDrawPolygon[blue](X_a,X_b,X_c)
 \tkzDrawPoints[red](A,B,C)
 \tkzDrawPoints[blue](X_a,X_b,X_c)
 \tkzDrawCircle[in](A,B,C)
 \tkzAutoLabelPoints[center=I,blue,font=\scriptsize]%
(X_a,X_b,X_c)
 \tkzAutoLabelPoints[center=I,red,font=\scriptsize]%
(A,B,C)
\end{tikzpicture}

\end{document}