Untitled

documentclass[pstricks,border=1cm,12pt,dvipsnames]{standalone}
usepackage[utf8]{inputenc}
usepackage[T1]{fontenc}
usepackage{amsfonts, amssymb}
usepackage{pst-eucl}

begin{document}
begin{pspicture}[showgrid](6,6)
pstTriangle[PointNameA=alpha,PointNameB=beta,PointNameC=gamma](4,1){A}(1,3){B}(5,5){C}
pstCircleABC[linecolor=blue]{A}{B}{C}{O}
rput[c](3,2.5){$angle x y z = 30^circ$}
end{pspicture}
end{document}

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script type="text/javascript" async
            src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2/MathJax.js?config=TeX-MML-AM_CHTML">
    </script>
</head>
<body>
    <p><img src="test.svg" /></p>
    <p>
        Angle (angle x y z).
    </p>
</body>
</html>