\input{preamble-standalone.ltx} \begin{document} % Ex. No. 163 (Section 20.2.4 : More complex example) \begin{tikzpicture}[scale=1.25] \tkzDefPoint(0,1){J} \tkzDefPoint(0,0){O} \tkzDrawArc[R,line width=1pt,color=red](J,2.5 cm)(180,0) \foreach \i in {0,-5,-10,...,-85,-90}{ \tkzDefPoint({2.5*cosd(\i)},{1+2.5*sind(\i)}){P} \tkzDrawSegment[color=orange](J,P) \tkzInterLC[R](P,J)(O,1 cm) \tkzGetPoints{M}{N} \tkzDrawPoints[red](N) } \foreach \i in {-90,-95,...,-175,-180}{ \tkzDefPoint({2.5*cosd(\i)},{1+2.5*sind(\i)}){P} \tkzDrawSegment[color=orange](J,P) \tkzInterLC[R](P,J)(O,1 cm) \tkzGetPoints{M}{N} \tkzDrawPoints[red](M) } \end{tikzpicture} \end{document}