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\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}
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