\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}