Anew facility is square in shape the length of the walls is twenty feet how many square feet is the facility and what is the perimeter of the facility

If it's a square, all sides are equal length. If they're all 20 feet, we can first use our perimeter formula for a square to find the perimeter. The formula is:

P = 4s, with P being perimeter and s being the length of a side.
Therefore, our perimeter is 80.

For the area of a square, we can use our formula for area of a square, which is
P = s².
To do this, we square twenty to get 400 as our area.
Hope this helps