You will need

- roulette;
- pencil and paper;
- thread.

Instruction

1

Remember that the perimeter is nothing but sum of the lengths of all sides of some geometric shapes. And wonderful when the room in which to perform the calculations , has the standard form, for example square or rectangle. In this case, it is sufficient to remember the school program. For example, if the room is square, calculate its

**perimeter**, measure the length of one side and multiply the result by four. The final number will be the perimeter of your**room**.2

Find the lengths of two adjacent walls and the sum of these numbers and multiply by two if the room is rectangular. The result is the perimeter of this room.

3

Measure all the straight lines and summarize the results obtained, if the room has some other arbitrary shape that is quite often found today.

4

Sometimes it happens that the room is round in shape. If you are sure that the room is round, measure its diameter, i.e. the distance from one point on a circle to another, passing through the center. And then use the formula in which the perimeter will be nothing less than the diameter of a circle multiplied by a constant value 3,14.

5

All of the above ways are correct. But here's the problem – not always the premises comply with all technical requirements and standards, namely, it so happens that the length of one wall different from the length of the opposite wall. For such cases, Arsenal have a very simple and effective way of calculating

**the perimeter****of the room**.6

Take regular thread as long as possible, and lay it along the line

**of the perimeter**. The place where she merges with the beginning of the reference must be noted. And then measure the resulting length. The result of this measurement will be the perimeter of your**room**.# Advice 2: How to calculate the circumference

Circle - a geometric figure that is drawn on a plane. Is the circumference of the plurality of points that are equidistant from a given center. In order to calculate its

**length**, you can apply multiple formulas.You will need

- You will need the following values:
- R - length of radius of the circle;
- D - the length of the diameter of a circle;
- π is a constant (π = 3.14)

Instruction

1

Method 1. Let the plane of a circle. Its radius is equal to R. Then

L = 2nr.

Example: the Radius

**the length**L of this**circle**is considered thus:L = 2nr.

Example: the Radius

**of the circle**R = 5 cm Then the length of**circumference**L = 2*3.14*5 = 31.4 cm2

Method 2. Given a circle with diameter D. Then L is:

L = πD.

Example: the Diameter

L = 3.14*10=31.4 cm

L = πD.

Example: the Diameter

**of a circle**D = 10 cm Then L is calculated as:L = 3.14*10=31.4 cm

Note

The answers in the first and second method are equal, because the length of the radius equal to half the length of the diameter of the circle.

# Advice 3: How to calculate what you're gonna have

Most young parents would like to influence the sex of their child. However, modern science has not yet learned to program the sex of a child. Sometimes even to determine who is still born, it is quite difficult. Certainly, many of your friends are faced with the wrong definition of the sex of the baby during the ultrasound examination. Thus, to calculate the gender of your baby is quite difficult, but some patterns still were seen. Extremely popular for instance the theory of sex determination of the baby's blood parents.

You will need

- In order to calculate the sex of your future child, it is desirable to know the exact date of conception and also have a piece of paper and a pen.

Instruction

1

Divide a sheet of paper into two columns, at the beginning of each write the date of birth of the parents.

2

It is believed that the blood in the male body completely renews itself every 4 years. Thus, increase it by 4 years in the column of the age of your spouse, until you reach the closest date to the time of conception.

Blood in the female body circulates much faster, so it is fully updated in just 3 years. Accordingly, in the column where the specified age of the mother, the start date need to increase by only 3 years, again until it is not close to the moment of conception.

Blood in the female body circulates much faster, so it is fully updated in just 3 years. Accordingly, in the column where the specified age of the mother, the start date need to increase by only 3 years, again until it is not close to the moment of conception.

3

Now compare the data in both columns. If the mother's blood at the time of conception "older" than the blood of the father, then chances are you are expecting a baby girl. If Vice versa, then you need to tune in to boy.

Note

If you or your spouse was the donor or undergone major surgery associated with loss or blood transfusion, considered the renewal periods, the blood should be from the date of these events.

Useful advice

To determine the sex of a child is possible and in ancient Chinese tables. Many women implicitly trust them. Find a description of the tables and rules you can use on any forum devoted to planning a pregnancy.

# Advice 4: How to calculate the cubic capacity of roundwood

When buying roundwood for construction, the need arises for its calculation. Of course, the timber industry provide services on calculation, but the calculation is done by the workers of the same timber industry that invariably leads to differences in the calculations.

Instruction

1

To calculate the cubic capacity of roundwood, it is possible to use special tables – kubaturnykh ISO 4480-83 and GOST 2708-75. You just need to measure the diameter of the upper end of the log and its length, and then on the given tables to find the cubic capacity. Folding successively cubing all of the logs, you will find the total cubic capacity of purchased roundwood.

2

In the Internet there are many design programs with which you can calculate the cubic capacity of roundwood without using a table, but only measuring the length and diameter of logs. The table is already in the program. However, it is not always convenient.

3

There is another way of measuring the cubic content of round timber – clearing stacked cubic meters per solid cubic meter. This is necessary because retail prices are usually set for a tight cubing.

4

Sort business the slab into two groups according to length: up to 2 m in length inclusive, and greater than 2 m. Place the slabs in a stack, alternating thin and thick ends alternately in opposite directions.

5

Allowed laying of short slabs with a connection length. Ensure that the pile had the same height throughout its length, the most dense styling and smooth angles.

6

Multiply the average length of the stack in its height and width. The resulting figure will be share with a cubic capacity of roundwood.

7

Multiply digit share of the category by the corresponding factor to obtain the mass of dense cubic capacity: a factor for debarked slabs up to 2 m of 0.48, with a length of over 2 m and 0.43; the ratio for debarked slabs up to 2 m is equal to 0.56, with a length of over 2 m – 0,50.

8

Of course you can trust the calculation of the cubic capacity of the warehouse workers, but to verify the correctness of the calculations is still not stopping. It is in your best interest.