\input{preamble-standalone.ltx} \begin{document} % Ex. No. 49 (Section 8.2 : Point on a circle) \begin{tikzpicture} \tkzDefPoints{0/0/A,4/0/B,0.8/3/C} \tkzDefPointOnCircle[angle=90,center=B,radius=1 cm] \tkzGetPoint{I} \tkzDefCircle[circum](A,B,C) \tkzGetPoint{G} \tkzGetLength{rG} \tkzDefPointOnCircle[angle=30,center=G,radius=\rG pt] \tkzGetPoint{J} \tkzDrawCircle[R,teal](B,1cm) \tkzDrawPoint[teal](I) \tkzDrawPoints(A,B,C) \tkzDrawCircle(G,J) \tkzDrawPoints(G,J) \tkzDrawPoint[red](J) \tkzLabelPoints(G,J) \end{tikzpicture} \end{document}