\input{preamble-standalone.ltx} \begin{document} % Ex. No. 103 (Section 17.0.6 : Option : "feuerbach") \begin{tikzpicture}[scale=1] \tkzDefPoint(0,0){A} \tkzDefPoint(3,0){B} \tkzDefPoint(0.5,2.5){C} \tkzDefCircle[euler](A,B,C) \tkzGetPoint{N} \tkzDefSpcTriangle[feuerbach, name=F](A,B,C){_a,_b,_c} \tkzDefSpcTriangle[excentral, name=J](A,B,C){_a,_b,_c} \tkzDefSpcTriangle[extouch, name=T](A,B,C){_a,_b,_c} \tkzDrawPoints[blue](J_a,J_b,J_c,F_a,F_b,F_c,A,B,C) \tkzClipBB \tkzShowBB \tkzDrawCircle[purple](N,F_a) \tkzDrawPolygon(A,B,C) \tkzDrawPolygon[blue](F_a,F_b,F_c) \tkzDrawCircles[gray](J_a,F_a J_b,F_b J_c,F_c) \tkzAutoLabelPoints[center=N,dist=.3, font=\scriptsize](A,B,C,F_a,F_b,F_c,J_a,J_b,J_c) \end{tikzpicture} \end{document}