Il suffit de réinsérer le même code dans un environnement *scope* avec l'option `xscale=-1` \documentclass[12pt, a4paper, english, BCOR = 0pt, DIV = 22]{scrartcl} \usepackage[T1]{fontenc} \usepackage[light, largesmallcaps]{kpfonts} \usepackage{tikz} \usepackage{float} \usepackage{babel} \begin{document} \begin{figure}[H] \centering \begin{tikzpicture}[scale = 1.2] \tikzstyle{N}= [circle, minimum size = 2 pt, inner sep = 2 pt, draw = black, fill = yellow] \draw [line width = 3 pt, color = red, rounded corners] (89.8:5.7) -- (89.8:5.5) arc [start angle = 89.8, end angle = 83, radius = 5.5] -- (83:5.7) arc [start angle = 83, end angle = 75, radius = 5.7] -- (70:7) arc [start angle = 70, end angle = 66.7, radius = 7] -- (65.5:7.3) ; \begin{scope}[xscale=-1] \draw [line width = 3 pt, color = green, rounded corners] (89.8:5.7) -- (89.8:5.5) arc [start angle = 89.8, end angle = 83, radius = 5.5] -- (83:5.7) arc [start angle = 83, end angle = 75, radius = 5.7] -- (70:7) arc [start angle = 70, end angle = 66.7, radius = 7] -- (65.5:7.3) ; \end{scope} \end{tikzpicture} \caption{Une ligne rouge} rouge et la même en vert (mais à l'envers)} \end{figure} \end{document} Il est possible aussi de passer l'option `xscale=-1` à la commande `\draw` \documentclass[12pt, a4paper, english, BCOR = 0pt, DIV = 22]{scrartcl} \usepackage[T1]{fontenc} \usepackage[light, largesmallcaps]{kpfonts} \usepackage{tikz} \usepackage{float} \usepackage{babel} \begin{document} \begin{figure}[H] \centering \begin{tikzpicture}[scale = 1.2] \tikzstyle{N}= [circle, minimum size = 2 pt, inner sep = 2 pt, draw = black, fill = yellow] \draw [line width = 3 pt, color = red, rounded corners] (89.8:5.7) -- (89.8:5.5) arc [start angle = 89.8, end angle = 83, radius = 5.5] -- (83:5.7) arc [start angle = 83, end angle = 75, radius = 5.7] -- (70:7) arc [start angle = 70, end angle = 66.7, radius = 7] -- (65.5:7.3) ; \draw [line width = 3 pt, color = green, rounded corners,xscale=-1] (89.8:5.7) -- (89.8:5.5) arc [start angle = 89.8, end angle = 83, radius = 5.5] -- (83:5.7) arc [start angle = 83, end angle = 75, radius = 5.7] -- (70:7) arc [start angle = 70, end angle = 66.7, radius = 7] -- (65.5:7.3) ; \end{tikzpicture} \caption{Une ligne rouge} rouge et sa symétrique en vert} \end{figure} \end{document}

Il suffit de réinsérer le même code dans un environnement *scope* avec l'option `xscale=-1` \documentclass[12pt, a4paper, english, BCOR = 0pt, DIV = 22]{scrartcl} \usepackage[T1]{fontenc} \usepackage[light, largesmallcaps]{kpfonts} \usepackage{tikz} \usepackage{float} \usepackage{babel} \begin{document} \begin{figure}[H] \centering \begin{tikzpicture}[scale = 1.2] \tikzstyle{N}= [circle, minimum size = 2 pt, inner sep = 2 pt, draw = black, fill = yellow] \draw [line width = 3 pt, color = red, rounded corners] (89.8:5.7) -- (89.8:5.5) arc [start angle = 89.8, end angle = 83, radius = 5.5] -- (83:5.7) arc [start angle = 83, end angle = 75, radius = 5.7] -- (70:7) arc [start angle = 70, end angle = 66.7, radius = 7] -- (65.5:7.3) ; \begin{scope}[xscale=-1] \draw [line width = 3 pt, color = green, rounded corners] (89.8:5.7) -- (89.8:5.5) arc [start angle = 89.8, end angle = 83, radius = 5.5] -- (83:5.7) arc [start angle = 83, end angle = 75, radius = 5.7] -- (70:7) arc [start angle = 70, end angle = 66.7, radius = 7] -- (65.5:7.3) ; \end{scope} \end{tikzpicture} \caption{Une ligne rouge} \end{figure} \end{document} Il est possible aussi de passer l'option `xscale=-1` à la commande `\draw` \documentclass[12pt, a4paper, english, BCOR = 0pt, DIV = 22]{scrartcl} \usepackage[T1]{fontenc} \usepackage[light, largesmallcaps]{kpfonts} \usepackage{tikz} \usepackage{float} \usepackage{babel} \begin{document} \begin{figure}[H] \centering \begin{tikzpicture}[scale = 1.2] \tikzstyle{N}= [circle, minimum size = 2 pt, inner sep = 2 pt, draw = black, fill = yellow] \draw [line width = 3 pt, color = red, rounded corners] (89.8:5.7) -- (89.8:5.5) arc [start angle = 89.8, end angle = 83, radius = 5.5] -- (83:5.7) arc [start angle = 83, end angle = 75, radius = 5.7] -- (70:7) arc [start angle = 70, end angle = 66.7, radius = 7] -- (65.5:7.3) ; \draw [line width = 3 pt, color = green, rounded corners,xscale=-1] (89.8:5.7) -- (89.8:5.5) arc [start angle = 89.8, end angle = 83, radius = 5.5] -- (83:5.7) arc [start angle = 83, end angle = 75, radius = 5.7] -- (70:7) arc [start angle = 70, end angle = 66.7, radius = 7] -- (65.5:7.3) ; \end{tikzpicture} \caption{Une ligne rouge} \end{figure} \end{document}