27 lines
845 B
TeX
27 lines
845 B
TeX
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\documentclass[margin=0.5cm]{standalone}
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\usepackage{tikz}
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\usepackage{tkz-euclide}
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\usepackage{mathtools}
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\begin{document}
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\begin{tikzpicture}
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\coordinate (A) at (0.5, 1) {};
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\coordinate (B) at (-0.5, -1) {};
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\coordinate (C) at (1.25, -0.70) {};
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\coordinate (0) at (0, 0) {};
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% left angle
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\tkzMarkRightAngle[draw=black,size=0.1](A,0,C);
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\draw[lightgray,very thin] (A) -- (C);
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% Curly brace annotation for ||u-v||
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\draw[decorate,decoration={brace,
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amplitude=10pt},xshift=0pt,yshift=4pt,very thin] (A) -- (C) node [black,midway,xshift=27pt,yshift=0.5em] {$\lVert u-v \rVert$};
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\draw[lightgray,very thin] (B) -- (C);
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% axis lines
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\draw[->] (0) -- (A) node[above] {$u$};
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\draw[->] (0) -- (B) node[below] {$-u$};
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\draw[->] (0) -- (C) node[right] {$v$};
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\end{tikzpicture}
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\end{document}
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