How to use black down triangle(▼) symbol in LaTeX?

Symbol/UnicodeBlack Down Triangle/U+25BC
Type of symbolMathematical operator
Package (requirement)mathabx
ArgumentNo
Latex command\blacktriangledown
Example\blacktriangledown → ▼

To print the Black Down Triangle symbol in a latex document, you need to use the \blacktriangledown command of the mathabx package.

\documentclass{article}
\usepackage{mathabx}
\begin{document}
   \[ \blacktriangledown\; No\; Smoking \]
   \[ \blacktriangledown\; Use\; Dustbin \]
   \[ \blacktriangledown\; Go\; Ahead \]
\end{document}

Output :

Use Black Down Triangle in latex.

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