\input{preamble-standalone.ltx} \begin{document} % Ex. No. 102 (Section 17.0.5 : Option : "extouch") \begin{tikzpicture}[scale=.7] \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} \tkzDefTriangleCenter[nagel](A,B,C) \tkzGetPoint{Na} \tkzDefTriangleCenter[centroid](A,B,C) \tkzGetPoint{G} \tkzDrawPoints[blue](Ja,Jb,Jc) \tkzClipBB \tkzShowBB \tkzDrawCircles[gray](Ja,Ta Jb,Tb Jc,Tc) \tkzDrawLines[add=1 and 1](A,B B,C C,A) \tkzDrawSegments[gray](A,Ta B,Tb C,Tc) \tkzDrawSegments[gray](Ja,Ta Jb,Tb Jc,Tc) \tkzDrawPolygon[blue](A,B,C) \tkzDrawPolygon[red](Ta,Tb,Tc) \tkzDrawPoints(A,B,C,Na) \tkzLabelPoints(Na) \tkzAutoLabelPoints[center=Na,blue](A,B,C) \tkzAutoLabelPoints[center=G,red, dist=.4](Ta,Tb,Tc) \tkzMarkRightAngles[fill=gray!15](Ja,Ta,B Jb,Tb,C Jc,Tc,A) \end{tikzpicture} \end{document}