%!TEX root=MathIng.tex

\begin{figure}[htb]

%%%die begin und end der minipage dürfen nicht mit Zeilenumbruch getrennt werden
\begin{minipage}[c]{0.33\textwidth}

\begin{framed}

\def\firstcircle{(2,0) circle (2cm)}
\def\secondcircle{(0,1) circle (1cm)} %(45:1)Winkel, Radius
\colorlet{circle edge}{black}
\colorlet{circle area}{black!20!white}

\tikzset{filled/.style={fill=circle area, draw=circle edge, thick},
    outline/.style={draw=circle edge,thick}}

\begin{tikzpicture}[scale=0.7]

\begin{scope}
        \clip \firstcircle;
        \fill[filled] \secondcircle;
        \end{scope}


    \draw[outline] \secondcircle node {$A$};
    \draw[outline] \firstcircle node {$B$};
 
    
    \draw[outline] \secondcircle node {$A$};
    \node[anchor=south,yshift=-2em] at (current bounding box.south) {$A \cap B$};   
\end{tikzpicture}	
	%\captionof{figure}{Venn-Diagramme}

\end{framed}	
\end{minipage}\begin{minipage}[c]{0.33\textwidth}

\begin{framed}

\def\firstcircle{(2,0) circle (2cm)}
\def\secondcircle{(-0.25,1) circle (1cm)}

\colorlet{circle edge}{black}
\colorlet{circle area}{black!20!white}

\tikzset{filled/.style={fill=circle area, draw=circle edge, thick},outline/.style={draw=circle edge,thick}}

\begin{tikzpicture}[scale=0.7]
    
    \fill[filled] \secondcircle node {$A$};
    \fill[filled] \firstcircle node {$B$};
 
    
    \draw[outline] \secondcircle node {$A$};
    \node[anchor=south,yshift=-8mm] at (current bounding box.south) {$A \cup B$};   
\end{tikzpicture}
	
\end{framed}	
\end{minipage}\begin{minipage}[c]{0.33\textwidth}

\begin{framed}

\def\firstcircle{(2,0) circle (2cm)}
\def\secondcircle{(-0.25,1) circle (1cm)}

\colorlet{circle edge}{black}
\colorlet{circle area}{black!20!white}

\tikzset{filled/.style={fill=circle area, draw=circle edge, thick},
    outline/.style={draw=circle edge,thick}}

\begin{tikzpicture}[scale=0.7]
    \begin{scope}
        \clip \secondcircle;
        \draw[filled, even odd rule] \secondcircle                                     \firstcircle;
    \end{scope}
    \draw[outline] \firstcircle node {$B$}
                   \secondcircle node {$A$};
    \node[anchor=south,yshift=-8mm] at (current bounding box.south) {$A \setminus B$};
\end{tikzpicture}

\end{framed}

\end{minipage}
\caption{Darstellung von Durchschnitts-, Vereinigungs- und Differenzmenge}\label{Abb002}
\end{figure}