# Square Matrix

A square matrix is simply a matrix with the same number of rows as it has columns.

$\left[\begin{array}{cccc}\hfill 1& \hfill 0& \hfill 9& \hfill 1\\ \hfill 1& \hfill 3& \hfill 5& \hfill 2\\ \hfill 0& \hfill 3& \hfill 6& \hfill -9\\ \hfill -2& \hfill 1& \hfill 4& \hfill 6\end{array}\right]{\to }\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\text{square}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\left(}{4}{×}{4}{\right)}$

$\left[\begin{array}{cc}\hfill 1& \hfill 0\\ \hfill 5& \hfill 4\\ \hfill 1& \hfill 4\end{array}\right]{\to }\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\text{not}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\text{square}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\left(}{3}{×}{2}{\right)}$