\input{preamble-standalone.ltx} \begin{document} % Ex. No. 173 (Section 21.1.1 : Example with \tkzname{size}) \begin{tikzpicture} \tkzInit \tkzDefPoints{0/0/O,2.5/0/A,1.5/2/B} \tkzFillAngle[size=2cm, fill=gray!10](A,O,B) \tkzDrawLines(O,A O,B) \tkzDrawPoints(O,A,B) \end{tikzpicture} \end{document}