8 and 1.
4 and 2.
The factor pairs are the length and width of the rectangles.
The factors of 8 are: 1,2,4,and 8. The factor pairs of 8 are: 1x8 2x4 These are the only two factor pairs
The factor pairs are 1 and 8, and 2 and 4
One to one.
1 and A
(21,1)(7,3)
Too many to list.
Number of factor pairs = number of rectangles
The factor pairs of 8 are 1,8 and 2,4
(8,1)(4,2)
(8,1)(4,2)
Too many to list here.