
\begin{tikzpicture}[scale=1]
%     \foreach \i [count=\ii from 1] in {378,234,90,306,162}
% \path (\i:32mm) node (p\ii) {$X_{\ii}$};
% \def\firstcircle{(0,0) circle (1.5cm)}
% \def\secondcircle{(45:2cm) circle (1.5cm)}
% \def\thirdcircle{(0:2cm) circle (1.5cm)}
%  \draw \firstcircle node[below] {$A_1$};
%     \draw \secondcircle node [above] {$A_2$};
%     \draw \thirdcircle node [below] {$A_3$};
    
    \draw (0,1) rectangle (4,4);
    \draw[thick] (0,2.3) node at (0.6,3.5){\small $A_1$}  arc (-90:0:1.7cm);
    \draw[thick] (0,1) node at (0.6,2){\small $A_2$}  arc (-90:22:1.7cm);
    \draw[thick] (1.6,3.37) node at (2.6,3.2){\small $A_3$}  arc (-160:-55:1.6cm);
    \draw[thick] (2.9,1) node at (2.2,1.6){\small $A_4$} arc(0:45:2.2cm);
    \draw node at (3.6,1.6) {\small $A_5$};
    \draw node at (0.3,4.3) {\small $\Omega$};
    % \draw[thick,blue,->] (p1) -- (p2);
% \draw[thick,blue,->] (p1) -- (p4);
% \draw[thick,blue,->] (p2) -- (p4);
% \draw[thick,blue,->] (p3) -- (p1);
% \draw[thick,blue,->] (p3) -- (p2);
% \draw[thick,blue,->] (p3) -- (p4);
% \draw[thick,blue,->] (p3) -- (p5);
% \draw[thick,blue,->] (p5) -- (p1);
% \draw[thick,blue,->] (p5) -- (p2);
% \draw[thick,blue,->] (p5) -- (p4);
\end{tikzpicture}
