\input{preamble-standalone.ltx} \begin{document} % Ex. No. 171 (Section 20.3.4 : Segment trisection) \begin{tikzpicture}[scale=.8] \tkzDefPoint(0,0){A} \tkzDefPoint(3,2){B} \tkzInterCC(A,B)(B,A) \tkzGetPoints{C}{D} \tkzInterCC(D,B)(B,A) \tkzGetPoints{A}{E} \tkzInterCC(D,B)(A,B) \tkzGetPoints{F}{B} \tkzInterLC(E,F)(F,A) \tkzGetPoints{D}{G} \tkzInterLL(A,G)(B,E) \tkzGetPoint{O} \tkzInterLL(O,D)(A,B) \tkzGetPoint{J} \tkzInterLL(O,F)(A,B) \tkzGetPoint{I} \tkzDrawCircle(D,A) \tkzDrawCircle(A,B) \tkzDrawCircle(B,A) \tkzDrawCircle(F,A) \tkzDrawSegments[color=red](O,G O,B O,D O,F) \tkzDrawPoints(A,B,D,E,F,G,I,J) \tkzLabelPoints(A,B,D,E,F,G,I,J) \tkzDrawSegments[blue](A,B B,D A,D% A,F F,G E,G B,E) \tkzMarkSegments[mark=s|](A,I I,J J,B) \end{tikzpicture} \end{document}