Question

Write an expression for the perimeter of the rectangle below.(Perimeter is the distance around a figure)

Answer 1

As you say well, the perimeter (P) of a figure is the "distance around it". What we need is just to add up to the length of all sides of the rectangle. Doing that, in this case, leads us to

`P=n+(n+2)+n+(n+2)`
`P=4n+4`

If you want a more elegant way to write it, it would be

`P=4(n+1)`