You can put this solution on YOUR website! You need to provide some of the values.
Let's assume the size of the rectangle is 2x by 4x
To find the perimeter, add 2 lengths and 2 widths.
The perimeter is a fence around a property. How many fence lengths will you need?
2x + 2x for the short sides, and
4x + 4x for the long sides.
2x+2x+4x+4x = 12x