\input{preamble-standalone.ltx} \begin{document} % Ex. No. 27 (Section 4.2.1 : Isosceles triangle with \tkzcname{tkzDefShiftPoint}) \begin{tikzpicture}[rotate=-30] \tkzDefPoint(2,3){A} \tkzDefShiftPoint[A](0:4){B} \tkzDefShiftPoint[A](30:4){C} \tkzDrawSegments(A,B B,C C,A) \tkzMarkSegments[mark=|,color=red](A,B A,C) \tkzDrawPoints(A,B,C) \tkzLabelPoints(B,C) \tkzLabelPoints[above left](A) \end{tikzpicture} \end{document}