\input{preamble-standalone.ltx} \begin{document} % Ex. No. 39 (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} \tkzDrawCircle[R,teal](B,1cm) \tkzDrawPoint[teal](I) \tkzDefCircle[circum](A,B,C) \tkzGetPoint{G} \tkzGetLength{rG} \tkzDefPointOnCircle[angle=30,center=G, radius=\rG pt] \tkzGetPoint{J} \tkzDrawPoints(A,B,C) \tkzDrawCircle(G,J) \tkzDrawPoint(G) \tkzDrawPoint[red](J) \end{tikzpicture} \end{document}