\documentclass{article}
\usepackage{tikz}
\usepackage{graphicx}
\usepackage{mwe} 
\usepackage{caption}
\captionsetup{format=hang}
\usepackage[total={13cm,22cm},centering,includehead=true]{geometry}
\usepackage{xepersian} 


\begin{document}
\begin{figure}
\centering
\begin{minipage}[c]{0.4\textwidth}
\centering
\begin{tikzpicture}
\begin{scope}[>=latex]
\draw [thick] (0,0)node[below left]{$A$} -- (3,0.5)node[right,below]{$B$};
\draw [thick] (0,0) -- (1,1.5)node[left,above]{$C$};
\draw [thick] (3,0.5) -- (4,2)node[left,above]{$D$};
\draw [thick] (1,1.5) -- (4,2);
\draw [fill] (0,0) circle [radius=0.03];
\draw [fill] (3,0.5) circle [radius=0.03];
\draw [fill] (1,1.5) circle [radius=0.03];
\draw [fill] (4,2) circle [radius=0.03];
\end{scope}
\end{tikzpicture} 
\caption{رأسهای روبرو در یک متوازی الاضلاع مجموع یکسانی دارند: $.A+D=C+B$}\label{fig1.3}
\end{minipage}
\hspace{1cm}
\begin{minipage}[c]{0.4\textwidth}
\centering
\begin{tikzpicture}
\begin{scope}[>=latex]
\draw (-0.2,0) node[below,node distance=-0.5cm]{\scalebox{0.8}{$O$}};
\draw (-0.5,0) -- (4,0);
\draw (0,-0.5) -- (0,3);
\draw[->][thick] (0,0) -- (3,0.5)node[right,below]{\scalebox{0.8}{$B$}};
\draw[->][thick] (0,0) -- (1,1.5)node[left,above]{\scalebox{0.8}{$C$}};
\draw[->][thick] (0,0) -- (4,2)node[right]{\scalebox{0.8}{$D=B+C$}};
\draw[densely dashed] (3,0.5) -- (4,2);
\draw[densely dashed] (1,1.5) -- (4,2);
\draw [fill] (0,0) circle [radius=0.03];
\draw [fill] (3,0.5) circle [radius=0.03];
\draw [fill] (1,1.5) circle [radius=0.03];
\draw [fill] (4,2) circle [radius=0.03];
\end{scope}
\end{tikzpicture} 
\caption{نمایش هندسی جمع برداری با استفاده از قانون متوازی الاضلاع.}\label{fig1.4}
\end{minipage}
\end{figure}






%\begin{figure}%
%\centering
%\parbox{2cm}{%
%\begin{tikzpicture}
%\begin{scope}[>=latex]
%\draw (-0.2,0) node[below,node distance=-0.5cm]{\scalebox{0.8}{$O$}};
%\draw (-0.5,0) -- (4,0);
%\draw (0,-0.5) -- (0,3);
%\draw[->][thick] (0,0) -- (3,0.5)node[right,below]{\scalebox{0.8}{$B$}};
%\draw[->][thick] (0,0) -- (1,1.5)node[left,above]{\scalebox{0.8}{$C$}};
%\draw[->][thick] (0,0) -- (4,2)node[right]{\scalebox{0.8}{$D=B+C$}};
%\draw[densely dashed] (3,0.5) -- (4,2);
%\draw[densely dashed] (1,1.5) -- (4,2);
%\draw [fill] (0,0) circle [radius=0.03];
%\draw [fill] (3,0.5) circle [radius=0.03];
%\draw [fill] (1,1.5) circle [radius=0.03];
%\draw [fill] (4,2) circle [radius=0.03];
%\end{scope}
%\end{tikzpicture}
%\caption{شکل اول.}%
%\label{fig:2figsA}}%
%\hskip 5cm
%\begin{minipage}{1.2in}%
%\centering
%\begin{tikzpicture}
%\begin{scope}[>=latex]
%\draw (-0.2,0) node[below,node distance=-0.5cm]{\scalebox{0.8}{$O$}};
%\draw (-0.5,0) -- (4,0);
%\draw (0,-0.5) -- (0,3);
%\draw[->][thick] (0,0) -- (3,0.5)node[right,below]{\scalebox{0.8}{$B$}};
%\draw[->][thick] (0,0) -- (1,1.5)node[left,above]{\scalebox{0.8}{$C$}};
%\draw[->][thick] (0,0) -- (4,2)node[right]{\scalebox{0.8}{$D=B+C$}};
%\draw[densely dashed] (3,0.5) -- (4,2);
%\draw[densely dashed] (1,1.5) -- (4,2);
%\draw [fill] (0,0) circle [radius=0.03];
%\draw [fill] (3,0.5) circle [radius=0.03];
%\draw [fill] (1,1.5) circle [radius=0.03];
%\draw [fill] (4,2) circle [radius=0.03];
%\end{scope}
%\end{tikzpicture}
%\caption{شکل دوم.}%
%\label{fig:2figsB}%
%\end{minipage}%
%\end{figure}%

\end{document}