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\input{preamble-standalone.ltx}
\begin{document}
% Ex. No. 118 (Section 16.0.3 : Option \tkzname{ex} or \tkzname{excentral} )
\begin{tikzpicture}[scale=.6]
\tkzDefPoints{0/0/A,6/0/B,0.8/4/C}
\tkzDefSpcTriangle[excentral,name=J](A,B,C){_a,_b,_c}
\tkzDefSpcTriangle[extouch,name=T](A,B,C){_a,_b,_c}
\tkzDrawPolygon[blue](A,B,C)
\tkzDrawPolygon[red](J_a,J_b,J_c)
\tkzDrawPoints(A,B,C)
\tkzDrawPoints[red](J_a,J_b,J_c)
\tkzLabelPoints(A,B,C)
\tkzLabelPoints[red](J_b,J_c)
\tkzLabelPoints[red,above](J_a)
\tkzClipBB \tkzShowBB
\tkzDrawCircles[gray](J_a,T_a J_b,T_b J_c,T_c)
\end{tikzpicture}
\end{document}
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