[Tex/LaTex] How to make a right angle symbol ⦝

symbols

How can I make the symbol ⦝ (measured right angle with dot, U+299D) with LaTeX?

(I tried Detexify and The Comprehensive LATEX Symbol List)

Best Answer

And a TikZ version:

\documentclass{article}
\usepackage{amsmath}
\usepackage{tikz}

\newcommand\RADot{%
  \mathord{%
    \mspace{1mu}%
    \text{\radot}%
    \mspace{1mu}%
  }%
}

\newcommand\radot{%
    \tikz[line cap=round,x=1ex,y=1ex,line width=0.3pt]
    {\draw (0,1) |- (1,0) (0.55,0) arc(0:90:0.55); \fill (0.23,0.23) circle (0.05);}%
}

\begin{document}

$a\RADot_{\RADot_{\RADot}}$

\end{document}

enter image description here