how do you find out the perimeter of a room
How to Measure Area and Perimeter. To measure the area and the perimeter of a standard square or rectangular room, you can always use the simple formulas below. (Length) x (Width) = Area. (Length) + (Width) = Perimeter.o calculate the area of a wall, use the standard formula of (Length) x (Width) = Area. Next, use the same formula to record the individual area of windows and doors. Once you have all of these measurements down, subtract the area of the windows and doors from the total area of the wall.