Interchanging of elements of rows and columns of a matrix is called.

Row matrix and column matrix

If the number of rows and that of columns of a matrix are equal and the matrix contains 16 elements, then the order of the matrix is _______

A rectangular arrangement of number in rows and columns is called _______

The sum of the principal diagonal elements of a square matrix is called

The sum of the principal diagonal elements of a square matrix is called

Interchange of Rows multiplying all elements of matrix to scalar Addition of rows to another row