\input{preamble-standalone.ltx} \begin{document} % Ex. No. 81 (Section 10.1.1 : Example with \tkzcname{tkzShowBB}) \begin{tikzpicture}[scale=.5] \tkzInit[ymax=5,xmax=8] \tkzGrid \tkzDefPoint(3,0){A} \begin{scope} \tkzClipBB \tkzDrawCircle[R](A,5 cm) \tkzShowBB \end{scope} \tkzDrawCircle[R,red](A,4 cm) \end{tikzpicture} \end{document}