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27 lines
906 B
TeX
27 lines
906 B
TeX
\documentclass[varwidth=true, border=2pt]{standalone}
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\usepackage{tkz-euclide}
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\begin{document}
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\usetkzobj{all}
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\begin{tikzpicture}
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\tkzSetUpPoint[shape=circle,size=10,color=black,fill=black]
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\tkzSetUpLine[line width=1]
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\tkzDefPoints{0/0/Q, 2/0/P, 1/2/R}
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\pgfmathsetmacro{\firstAngle}{0}
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\pgfmathsetmacro{\secondAngle}{-120}
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\path[draw,red, fill=red!40] (Q) -- ++(\firstAngle:.4) arc[start angle=\firstAngle, delta angle=\secondAngle,radius=.4];
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\tkzMarkAngle[arc=l,size=0.8cm,color=green,fill=green!20](Q,R,P)
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\path[draw] ++(-50:.2) node[rotate=-50] {$\alpha$};
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\node at (1,1.5) {$\beta$};
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\tkzDrawLine(Q,P)
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\tkzDrawLine(Q,R)
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\tkzDrawLine(P,R)
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\tkzDrawPoints(P,Q,R)
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\node at ($(R) + (0.03,0.4)$) {$R$}; %top
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\node at ($(Q) + (-0.3,-0.22)$) {$Q$}; %left
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\node at ($(P) + ( 0.3,-0.18)$) {$P$}; %right
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\end{tikzpicture}
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\end{document}
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