The factor pairs are the length and width of the rectangles.
(21,1)(7,3)
1 and A
One to one.
As I understand it, the number of factor pairs is equal to the number of rectangles.
The factor pairs are the length and width of the rectangles.
One to one.
3 and 15
The factor pairs of 135 are: 1, 135 3, 45 5, 27 9, 15
(45,1)(15,3)(9,5)
(45,1)(15,3)(9,5)
(45,1)(15,3)(9,5)
Too many to list.
(21,1)(7,3)
1 and A
Number of factor pairs = number of rectangles
Too many to list here.