# How to Write the Not Congruent Symbol (≇) in LaTeX

In LaTeX, you can write the not congruent symbol (≇) using the `\ncong`

command. This command is part of the `amssymb`

package, so you need to include this package in LaTeX document.

The following examples show how to write the not congruent symbol in LaTeX.

## How to Write the Not Congruent Symbol in Text

We can use the `\ncong`

command to write the not congruent symbol in LaTeX document for text.

Suppose we want to write the not congruent symbol in the text.

We can use the following LaTeX code to do so:

```
\documentclass{article}
\usepackage{amssymb}
\begin{document}
This is an example of using the not congruent symbol \( a \ncong b \) in a sentence.
\end{document}
```

Output: 👇️

```
This is an example of using the not congruent symbol a ≇ b in a sentence.
```

In this example, we use the `\ncong`

command to display the not congruent symbol in the text.

## How to Write the Not Congruent Symbol in Mathematical Expressions

For mathematical expressions, We can use the `\ncong`

command to ensure proper formatting.

Suppose we would like to write mathematical expressions that contain the not congruent symbol.

We can use the following LaTeX code to do so:

```
\documentclass{article}
\usepackage{amssymb}
\begin{document}
An inline mathematical expression: \( a \ncong b \).
A displayed mathematical expression:
\[
a \ncong b
\]
\end{document}
```

Output: 👇️

In this example, we use the `\ncong`

command to denote the not congruent symbol in both inline and displayed mathematical expressions.

## Conclusion

We can use the `\ncong`

command from the `amssymb`

package for both text and mathematical expressions. This ensures that the not congruent symbol is properly formatted and displayed in LaTeX document.