\documentclass[12pt,a4paper]{article}
\usepackage{tikz}
\usepackage{tkz-euclide}
\usepackage{xepersian}
\begin{document}
\begin{figure}[htp]
\centering
 ‎\begin{tikzpicture}[scale=1.5]
 ‎\tkzInit[xmin=-1.5,xmax=4,xstep=1]
 ‎\tkzAxeX[label={}]
 \tkzDefPoint(0,0){O}   \tkzDefPoint(1,1){A}  \tkzDefPoint(1,0){B}
 \tkzDefPoint(1.42,0){E}
 \tkzDrawSegment[dashed](A,B)
 \tkzDrawSegment[dashed](O,A)
 \tkzDrawPoints[fill=black,size=9](O,A,B,E)
\tkzDrawCircle[dashed](O,A)

\tkzLabelPoint[below, red](E){\scriptsize $\sqrt{2}$}
\tkzLabelSegment[left=2pt,red](O,A){\scriptsize$\sqrt{2}$}
\end{tikzpicture}
\caption{نمایش $\sqrt{2}$ روی محور اعداد حقیقی}
\end{figure}
‎\end{document}