# Need to type a right triangle symbol but unicode input problem

I need to type a right triangle symbol, whose unicode is U+22BF or U+25FF, see

http://www.fileformat.info/info/unicode/char/25ff/index.htm

What I get in the template I used is

\RequirePackage[T1]{fontenc}
\RequirePackage[utf8]{inputenc}
\RequirePackage{lmodern}


I don't want to change to utf8x.

The engine I use is pdflatex.

I can't figure out how to make it work. Is there a way to type the unicode code to obtain the unicode symbol in output?

• You need a font that has this character, and some files to use it with (pdf)latex. I don't think Latin Modern has. – Bernard Sep 28 '15 at 19:22
• Do you need the symbol in math and scalable in superscripts/subscripts? – egreg Sep 28 '15 at 21:06

Picture mode to the rescue:

\documentclass{article}
\usepackage{pict2e}

\DeclareRobustCommand{\lowerrighttriangle}{%
\begingroup
\setlength{\unitlength}{1ex}%
\begin{picture}(1,1)
\polyline(1,0)(0,0)(1,1)(1,0)(.5,0)
\end{picture}%
\endgroup
}

\begin{document}

x \lowerrighttriangle{} y

\end{document}