Dimensions of a Matrix

This looks like a good start!  However, this student needs to add something about the square matrices and the matrix that is the identity matrix.  These are important concepts that you need to be able to identify!

Dimensions of a Matrix: "To count matrices you count row X column

This matrix is one row by three columns, so it is a 1 x 3 matrix.

This matrix is three rows by three columns, so this is a 3 x 3 matrix.

This matrix is three rows by two columns, so it is a 3 x 2 matrix.

This is another three rows by three columns, so this is a 3 x 3 matrix.

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