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Every wall needs two measurements ... the length of the wall and the height of the wall.In a typical room, the walls all have the same height, but their lengths may be different.The area of each wall is (length) multiplied by (height).After you "do" the area of each individual wall, you can add up the four numbers.The sum tells you how much paint or wall-paper you'll need to cover the walls.
In the extremely unlikely event that the room has no doors (nor windows), Area of floor and ceiling = 99 sq ft each. Area of smaller walls = 72 sq ft each. Area of larger walls = 88 sq ft each.
two walls are 4m * 3m And Two walls that are 5.5m * 3m A = 2(4*3)+ 2(5.5*3) A= 2*12 + 2*16.5 A= 24+33 A= 57
Area = length x height If you have a room three feet long and four feet wide, the area is 12 feet squared.
Measure the room diagonally from one corner to the other.do this again on the other diagonal. If the room is square then both measurements will be the same assuming that all four side(walls) are the same length Not all four side walls need to be the same. As long as the walls opposite each other are the same length (a square or rectangular room) then the above answer works.