Is there a $\LaTeX$ symbol for a right-angled triangle, with the triangle lying on its right angle, either on the left or right?

There is $\triangle$, $\triangledown$, $\triangleleft$, $\triangleright$ but no right-angled triangle.

Any help would be appreciated. If there is none, perhaps some pointers on how to construct one. Thanks.


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  • $\begingroup$ I don't know, but I know there's a tex.stackexchange.com. $\endgroup$ – Gerry Myerson Oct 30 '16 at 5:14
  • 3
    $\begingroup$ tex.stackexchange.com/questions/65455/… $\endgroup$ – davidlowryduda Oct 30 '16 at 5:24
  • $\begingroup$ Thanks for your input, Gerry and mixedmath. The link was very helpful, @mixedmath $\endgroup$ – hypergeometric Oct 30 '16 at 7:53
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    $\begingroup$ I used a picture environment. Unfortunately, answers are closed. Hopefully this will paste right. \begin{picture}(7,7) \put(1,6){\line(1,0){5}} \put(1,6){\line(0,-1){5}} \put(1,1){\line(1,1){5}} \end{picture} If the diagonal line doesn't print, you may need to add a \usepackage{pict2e} to the preamble. $\endgroup$ – johnnyb Jun 17 '18 at 17:42

In the "Mathematical Operators" section, we have

\unicode{0x22BF}$=\unicode{0x22BF}$ (RIGHT TRIANGLE)

As pointed out by hypergeometric, in the "Geometric Shapes" section, we also have

\unicode{0x25FA}$=\unicode{0x25FA}$ (LOWER LEFT TRIANGLE)
\unicode{0x25FF}$=\unicode{0x25FF}$ (LOWER RIGHT TRIANGLE)

  • $\begingroup$ Thanks! That was very helpful! (+1) $\endgroup$ – hypergeometric Oct 30 '16 at 13:15

Posting this as a note to myself.

\unicode{0x25FA}: $\qquad\unicode{0x25FA}$

\unicode {0x22BF}: $\qquad\unicode {0x22BF}$

  • 1
    $\begingroup$ So ... \unicode is recognized by Mathjax, but not by LaTeX. $\endgroup$ – GEdgar Oct 30 '16 at 13:39
  • $\begingroup$ It appears so. Had to change (...) to {...}. $\endgroup$ – hypergeometric Oct 30 '16 at 13:39
  • $\begingroup$ (+1) I don't know how the parentheses crept into my answer. I thought I had simply copied the LaTeX, but I guess in removing the backslashes, I made more of a change than I thought. I didn't see 0x25FA. In the Unicode table, it looks a lot smaller. Good catch! $\endgroup$ – robjohn Oct 30 '16 at 17:09
  • $\begingroup$ @robjohn - Thanks for pointing out the crucial step! $\endgroup$ – hypergeometric Oct 30 '16 at 17:12

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