Dimensions of a Matrix

The Dimensions of matrices basically are te rows and the colums thet the Matrices have.
The rule for this to work properly is to multiply the column times the row.

Ex. Here is a 4x2 and a 2x3 matrices.

To multiply this kind of matrices you have to multiply the number of columns in matrix A times the number of rows in matrix B to finally get the answer if 4x3.

Regularlly you'll get the number of rows of the first matrix and the number of columns in the second matix. 

How to Multiply Matrices?

Here we have an example of a 3x2 multiplied by a 2x4.

to do this you have to multiply every number by its following number in the second matrix. The rows of A times the coloumns of B.