Now, quadrilateral ABCD in the matrix form, can be represented as
2
4
A
B
C D
1
3
1
1
X
0 2
3
2
×
−


= 



or
4 2
A 1
0
B
3
2
Y
C
1
3
D
1
2
×






=




−

Thus, matrices can be used as representation of vertices of geometrical figures in
a plane Now, let us consider some examples Example 1 Consider the following information regarding the number of men and women
workers in three factories I, II and III
Men workers
Women workers
I
30
25
II
25
31
III
27
26
Represent the above information in the form of a 3 × 2 matrix What does the entry
in the third row and second column represent