documentstyle{standalone}
usepackage{tikz}

begin{document}
begin{figure}[H]
centering
begin{tikzpicture}
draw (0,0) node[anchor=east]{$(0,1,0)$} -- (4,0) node[anchor=west]{$(1,0,0)$} -- (2,4) node[anchor=south]{$(0,0,1)$} -- cycle;
end{tikzpicture}
end{figure}
end{document}