\documentclass[12pt,a4paper]{article}
\usepackage[francais]{babel}
\usepackage{mafr}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{lmodern}
\usepackage[dvipsnames]{xcolor}
\usepackage{pstricks}
\usepackage{pst-eucl}
\begin{document}
\begin{pspicture}(0,0)(7,4)%
\pstGeonode(2,2){A}(3,2.5){B}(1,2.5){C}%
\pstArcOAB{A}{B}{C}%
\pstGeonode(5,2){D}(6,2.5){E}(4,3.5){F}%
\pstArcnOAB{D}{E}{F}%
\end{pspicture}
\end{document}
