How to use down triangle(▽) symbol in LaTeX?

Symbol/UnicodeDown Triangle/U+25BD
Type of symbolMathematics
Package (requirement)amssymb
Latex command\triangledown
Example\triangledown → ▽

To print the Down Triangle symbol in a latex document, you need to use the \triangledown command included in the amssymb package.

\usepackage{amssymb, amsmath}
   % using \substack command of amsmath package
   \[ \substack{ \vartriangle \\ \triangledown  } ABC \]
   \[ \substack{ \vartriangle \\ \triangledown  } XYZ \]
   \[ \substack{ \vartriangle \\ \triangledown  } 123 \]

Output :

Use down triangle symbol in latex.

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