Name the lengths of the sides of three rectangles with perimeters of 12 unitsuse onley whole numbers?

The perimeter of a rectangle is calculated using the formula ( P = 2(l + w) ), where ( l ) is the length and ( w ) is the width. For a perimeter of 12 units, the possible pairs of whole numbers for lengths and widths are: (1, 5), (2, 4), and (3, 3). Therefore, the lengths of the sides of three rectangles could be: 1 unit and 5 units, 2 units and 4 units, and 3 units and 3 units.