\documentclass[10pt]{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.15}
\usepackage{mathrsfs}
\usetikzlibrary{arrows}
\pagestyle{empty}
\newcommand{\degre}{\ensuremath{^\circ}}
\begin{document}
\definecolor{qqwuqq}{rgb}{0,0.39215686274509803,0}
\definecolor{zzttqq}{rgb}{0.6,0.2,0}
\definecolor{ududff}{rgb}{0.30196078431372547,0.30196078431372547,1}
\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1cm,y=1cm]
\begin{axis}[
x=1cm,y=1cm,
axis lines=middle,
ymajorgrids=true,
xmajorgrids=true,
xmin=0,
xmax=7.36,
ymin=0,
ymax=7.48,
xtick={0,0.5,...,7},
ytick={0,1,...,7},]
\clip(0,0) rectangle (7.36,7.48);
\fill[line width=2pt,color=zzttqq,fill=zzttqq,fill opacity=0.10000000149011612] (2,2) -- (5,4) -- (5,1) -- cycle;
\draw [shift={(2,2)},line width=2pt,color=qqwuqq,fill=qqwuqq,fill opacity=0.10000000149011612] (0,0) -- (-18.43494882292201:0.1943661971830986) arc (-18.43494882292201:33.69006752597979:0.1943661971830986) -- cycle;
\draw [shift={(5,4)},line width=2pt,color=qqwuqq,fill=qqwuqq,fill opacity=0.10000000149011612] (0,0) -- (-146.30993247402023:0.1943661971830986) arc (-146.30993247402023:-90:0.1943661971830986) -- cycle;
\draw [shift={(5,1)},line width=2pt,color=qqwuqq,fill=qqwuqq,fill opacity=0.10000000149011612] (0,0) -- (90:0.1943661971830986) arc (90:161.565051177078:0.1943661971830986) -- cycle;
\draw [line width=2pt,color=zzttqq] (2,2)-- (5,4);
\draw [line width=2pt,color=zzttqq] (5,4)-- (5,1);
\draw [line width=2pt,color=zzttqq] (5,1)-- (2,2);
\begin{scriptsize}
\draw [fill=ududff] (2,2) circle (2.5pt);
\draw[color=ududff] (2.053802816901409,2.215) node {$A$};
\draw [fill=ududff] (5,4) circle (2.5pt);
\draw[color=ududff] (5.053521126760564,4.215) node {$B$};
\draw [fill=ududff] (5,1) circle (2.5pt);
\draw[color=ududff] (5.053521126760564,1.215) node {$C$};
\draw[color=qqwuqq] (2.4814084507042256,2.085) node {$\alpha = 52.13\textrm{\degre}$};
\draw[color=qqwuqq] (5.286760563380282,3.965) node {$\beta = 56.31\textrm{\degre}$};
\draw[color=qqwuqq] (5.299718309859156,1.165) node {$\gamma = 71.57\textrm{\degre}$};
\end{scriptsize}
\end{axis}
\end{tikzpicture}
\end{document
