You will need

- Roulette (you can use both conventional and electronic), Notepad and pencil, as well as minimum knowledge in mathematics.

Instruction

1

If the room is a rectangle or a square, to find its

**area**you can, measure the length and width and multiplying them to each other. All value is expressed in metres (to get**the area**of the room in m?). Note that for a correct calculation of the required number of materials in the General**area**of the room not included the sizes of window and door openings and**the area of the**wall arches under the heating radiators is added.2

If you want to measure

**the area**of the room where there are any ledges, niches and recesses (for example, can perform plumbing design, storage space, decorative columns), it is necessary to separately measure these elements and structures. The area of the protrusions and depressions is considered to be the same as**the area**of a rectangular room (the product of length and width). It is worth to note that**the area**of the protruding structures is deducted from the total area of the room, and the size of the niches and recesses added.3

In the case of the measurement of the room is irregular in shape to more accurately calculate square, you divide it into rectangles. Calculating

**the area**of each such portion, it is possible to know the total**area**of the room by simply summing up all the obtained results.4

If you divide the room into rectangular areas is not possible, you can try such figures as a triangle or sector of a circle. The area of the triangle is considered by Heron's formula: S=v(p*(p-a)*(R-b)*(p-C)).

R - properiter triangle, which can be calculated thus: p=(a+b+C)/2

a, b, C – lengths of triangle sides.The area of the circle is calculated by the classic formula "PI R square" .

The summation of the obtained results gives

R - properiter triangle, which can be calculated thus: p=(a+b+C)/2

a, b, C – lengths of triangle sides.The area of the circle is calculated by the classic formula "PI R square" .

The summation of the obtained results gives

**the area**of the room.