\input{preamble-standalone.ltx} \begin{document} % Ex. No. 204 (Section 29.2.5 : Exemple : Dimitris Kapeta) \begin{tikzpicture}[scale=1.25] \tkzDefPoint(0,0){O} \tkzDefPoint(2.5,0){N} \tkzDefPoint(-4.2,0.5){M} \tkzDefPointBy[rotation=center O angle 30](N) \tkzGetPoint{B} \tkzDefPointBy[rotation=center O angle -50](N) \tkzGetPoint{A} \tkzInterLC(M,B)(O,N) \tkzGetFirstPoint{C} \tkzInterLC(M,A)(O,N) \tkzGetSecondPoint{A'} \tkzMarkAngle[mkpos=.2, size=0.5](A,C,B) \tkzMarkAngle[mkpos=.2, size=0.5](A,M,C) \tkzDrawSegments(A,C M,A M,B) \tkzDrawCircle(O,N) \tkzLabelCircle[above left](O,N)(120){$\mathcal{C}$} \tkzMarkAngle[mkpos=.2, size=1.2](C,A,M) \tkzDrawPoints(O, A, B, M, B, C) \tkzLabelPoints[right](O,A,B) \tkzLabelPoints[above left](M,C) \tkzLabelPoint[below left](A'){$A'$} \end{tikzpicture} \end{document}