\input{preamble-standalone.ltx} \begin{document} % Ex. No. 218 (Section 30.3.1 : use of\tkzcname{tkzSetUpCompass} with bisector) \begin{tikzpicture}[scale=0.75] \tkzDefPoints{0/1/A, 8/3/B, 3/6/C} \tkzDrawPolygon(A,B,C) \tkzSetUpCompass[color=red,line width=.2 pt] \tkzDefLine[bisector](A,C,B) \tkzGetPoint{c} \tkzDefLine[bisector](B,A,C) \tkzGetPoint{a} \tkzDefLine[bisector](C,B,A) \tkzGetPoint{b} \tkzShowLine[bisector,size=2,gap=3](A,C,B) \tkzShowLine[bisector,size=2,gap=3](B,A,C) \tkzShowLine[bisector,size=1,gap=2](C,B,A) \tkzDrawLines[add=0 and 0 ](B,b C,c) \tkzDrawLine[add=0 and -.4 ](A,a) \tkzLabelPoints(A,B) \tkzLabelPoints[above](C) \end{tikzpicture} \end{document}