\input{preamble-standalone.ltx} \begin{document} % Ex. No. 160 (Section 20.2.1 : Simple example of a line-circle intersection) \begin{tikzpicture}[scale=.75] \tkzInit[xmax=5,ymax=4] \tkzDefPoint(1,1){O} \tkzDefPoint(0,4){A} \tkzDefPoint(5,0){B} \tkzDefPoint(3,3){C} \tkzInterLC(A,B)(O,C) \tkzGetPoints{D}{E} \tkzDrawCircle(O,C) \tkzDrawPoints[color=blue](O,A,B,C) \tkzDrawPoints[color=red](D,E) \tkzDrawLine(A,B) \tkzLabelPoints[above right](O,A,B,C,D,E) \end{tikzpicture} \end{document}