Dimensions of a Matrix

Name the dimensions:

• 6x2

• 2x6

• 12

• 36

Dimensions?

• a

• b

• c

• d

• A
• B
• C
• D

Dimensions in matrix is defined as

• the number of rows and the number of columns, indicated by m × n, where m is the number of rows and n is the number of columns.

• the number of rows equal to the number of columns.

• the number of rows in the matrix.

• the number of columns in the matrix.

Match each matrix to its correct dimension.

• 2 x 3

• 
• 2 x 4

• 
• 3 x 1

• 
• 1 x 3

• 
• 4 x 2

• 

A (a)   describes the size of the matrix by the number of rows and columns.

• dimension

• entry

• array

• matrix

Name the dimensions

• 3x1

• 1x3

• 3

• 1

How many rows are in a 7 x 3 matrix?

• 7

• 3

• 21

• 10

What are the dimensions of this matrix?

• 2 x 3

• 3 x 2

• undefined

What must be true in order to ADD two matrices?

• They must be square.

• Their dimensions must be equal.

• The number of columns of the 1st must equal the number of rows of the second.

• The number of rows of the 1st must equal the number of columns of the second.