Answer
If in a matrix, the number of rows is equal to the number of columns, then the matrix is called the square matrix.
Work Step by Step
A square matrix is the matrix in which the number of rows is equal to the number of columns.
For example,
$A=\left[ \begin{matrix}
1 & 2 \\
3 & 5 \\
\end{matrix} \right]$
and
$B=\left[ \begin{matrix}
1 & 2 & 3 & 45 \\
5 & 4 & 8 & 6 \\
8 & 6 & 7 & 2 \\
74 & 8 & 7 & 6 \\
\end{matrix} \right]$
