Matrices
Each number in a matrix is an element (or entry) of the matrix. The dimensions of a matrix are the number of rows and columns.
A matrix is simply a rectangular table of numbers written in either ( ) or [ ] brackets.
The size of a matrix is written: rows × columns.
Elements in a matrix
The elements in a matrix A are denoted by aij, where i is the row number and j is the column number
Equality of Matrices
Two matrices are equal if and only if they have the same dimensions, and the elements in all corresponding positions (same row, same column) are equal.
Equal matrices have identical corresponding elements.
Matrices of different dimensions can never be equal.
Find out more about matrices by reading the explanation below.
Practice: Determine the dimensions of a matrix in the following exercises.