\input{preamble-standalone.ltx} \begin{document} % Ex. No. 28 (Section 4.2.2 : Equilateral triangle) \begin{tikzpicture}[scale=1] \tkzDefPoint(2,3){A} \tkzDefShiftPoint[A](30:3){B} \tkzDefShiftPoint[A](-30:3){C} \tkzDrawPolygon(A,B,C) \tkzDrawPoints(A,B,C) \tkzLabelPoints(B,C) \tkzLabelPoints[above left](A) \tkzMarkSegments[mark=|,color=red](A,B A,C B,C) \end{tikzpicture} \end{document}