\input{preamble-standalone.ltx} \begin{document} % Ex. No. 80 (Section 12.1.2 : Example with \tkzname{bisector} and \tkzname{normed}) \begin{tikzpicture}[rotate=25,scale=.75] \tkzDefPoints{0/0/C, 2/-3/A, 4/0/B} \tkzDefLine[bisector,normed](B,A,C) \tkzGetPoint{a} \tkzDrawLines[add= 0 and .5](A,B A,C) \tkzShowLine[bisector,gap=4,size=2,color=red](B,A,C) \tkzDrawLines[blue!50,dashed,add= 0 and 3](A,a) \end{tikzpicture} \end{document}