\input{preamble-standalone.ltx} \begin{document} % Ex. No. 21 (Section 4 : Definition of a point) \begin{tikzpicture}[,scale=1] \tkzInit[xmax=5,ymax=5] \tkzDefPoints{0/0/O,1/0/I,0/1/J} \tkzDefPoint(40:4){P} \tkzDrawXY[noticks,>=triangle 45] \tkzDrawSegment[dim={$d$, 16pt,above=6pt}](O,P) \tkzDrawPoints(O,P) \tkzMarkAngle[mark=none,->](I,O,P) \tkzFillAngle[fill=blue!20, opacity=.5](I,O,P) \tkzLabelAngle[pos=1.25](I,O,P){$\alpha$} \tkzLabelPoint(P){$P (\alpha : d )$} \tkzDrawPoints[shape=cross](I,J) \tkzLabelPoints(O,I) \tkzLabelPoints[left](J) \end{tikzpicture} \end{document}