is a rectangular array of numbers arranged in rows and columns. The array of numbers below is an example of a matrix.

The number of rows and columns that a matrix has is called

Numbers that appear in the rows and columns of a matrix are called

A matrix that has all 0 elements is called a null matrix. It can be of any order.

 is a matrix with only one row. Its order would be 1 X C, where C is the number of columns.

 is a matrix with only one column.  represented by an order of R X 1, where R is the number of rows.

A matrix where the number of rows is equal to the number of columns

is a square matrix where all the elements are 0 except for those in the diagonal from the top left corner to the bottom right corner.

A special type of diagonal matrix, where all the diagonal elements are equal

A square matrix where all the elements below the left-right diagonal are 0 is called

A square matrix where all the elements above the left-right diagonal are 0 is called

A matrix whose transpose is the same as the original matrix

is another matrix that is formed by switching the rows and columns of a given matrix.