Consider the matrix shown below:

What are the dimensions of A.

3 X 4

4 X 3

12

A and B

Dimensions of a matrix:

r * c

Where r is the no. of rows and c is the no. of columns

If A has 4 rows (horizontal) and 3 columns (vertical),

Dimensions are: 4 * 3

If A has 3 rows (horizontal) and 4 columns (vertical),

Dimensions are: 3 * 4