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## How to translate kilometers in square kilometers

When solving practical tasks, sometimes it is necessary to translate in each other completely dissimilar units of measurement. For example, liters are often translated into kilograms, and kilometers in square kilometers. However, in each particular case, the solution of such a problem, as a rule, does not cause difficulties. It is only necessary to delve into the essence of the task and use the additional (related) information. Instruction

To translate

kilometers in square

kilometers, it is necessary to clarify what is measured or calculated in these units. Most likely, this will be characteristics such as the area and linear length of the object. As a rule, in such cases

it happens

The width of the object is known, and the length or area may vary in significant limits.

For the translation of Kilo

meters

в

Square

Kilometers when measuring the road, simply multiply the length of the road on its width. The width of the road is also pre-transferred to kilometers. Since the width of the road is usually set (measured) in meters, then simply divide the width of the road (in meters) per 1000.If the width of the road is inconstant, then translate into square kilometers every plot having the same width. After that fold the obtained areas. If a

High

The accuracy of calculating is unimportant, take its average width as a width of the road. If the road is the federal route, then find its width in the relevant reference books (for example, motorist atlas). For approximate calculations, the width of the central highway is taken to take 8 meters equal to 8 meters (0.008 km) is the average width of the federal highways.

To find out how many square kilometers are contained a few kilometers of building material (for example, linoleum or wallpaper), multiply by the width of the material (translated into kilometers), the rowing length is also pronounced in kilometers. If building materials are shipped in rolls (pieces) of different widths, then multiply to the corresponding width of the routine length of each roll and fold the products obtained.

Sources:

• How to translate square millimeters in square

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## General In a number of European countries and in Indonesia, land plots are measured in Arakh

The area is the magnitude of the geometric shape in two-dimensional space. It is used in mathematics, medicine, engineering and other sciences, for example, in calculating the cross section of cells, atoms, or pipes, such as blood vessels or tap pipes. In geography, the area is used to compare the sizes of cities, lakes, countries and other geographical objects. The population density calculations also uses the area. The population density is defined as the number of people per unit area.

## Units

### Square meters

The area is measured in the SI system in square meters. One square meter - square square, with one meter side.

### Single square

A single square is a square with the parties to one unit. The unit square is also equal to one. In the rectangular coordinate system, this square is in coordinates (0.0), (0.1), (1.0) and (1,1). On the complex plane of the coordinate - 0, 1, i и i+1, where i- imaginary number.

### AR

AR or weaving, as a measure of the square, is used in the CIS countries, Indonesia and some other European countries, to measure small urban objects such as parks when hectare is too large. One AP is 100 square meters. In some countries, this unit is called otherwise.

### Hectare

In hectares, real estate are measured, especially land plots. One hectare is 10,000 square meters. It is used since the time of the French revolution, and applies to the European Union and some other regions. As well as AR, in some countries hectare is called differently. In the southern part of the province of Ontario, Canada

### Acre

In North America and Burma, the area is measured in acres. Hectares are not used there. One acre is 4046.86 square meters. Initially, Acre was determined as an area that a peasant with a harness from two oxes could have been plowed in one day.

### Barne

Barna are used in nuclear physics to measure cross-section of atoms. One barne is equal to 10⁻² ⁸ square meters. Barne is not a unit in the SI system, but adopted to use in this system. One barne is approximately equal to the cross-sectional area of ​​the uranium core, which the physicists were jokingly called "huge, like barn." Barn in English "BARN" (pronounced Barn) and from the joke of physicists This word was the name of the unit of Square. This unit originated during the Second World War, and liked the scientist, because its name could be used as a code in correspondence and telephone conversations within the Manhattan project.

## Calculation of Square

The area of ​​the simplest geometric shapes are found by comparing them with a square of the famous area. It is convenient because the square area is easy to calculate. Some formulas for calculating the area of ​​geometric shapes shown below are obtained in this way. Also for calculating the area, especially the polygon, the figure is divided into triangles, calculate the area of ​​each triangle according to the formula, and then fold. The area of ​​more complex figures is calculated using mathematical analysis.

### Formulas for calculating the area

• Square: Side in a square.
• Rectangle: Work of the parties.
• Triangle (known side and height): The work of the side and height (distances from this side to the edge), divided by half. Formula: A = ½AH where A- square, a- side and h- Height.
• Triangle (two sides and angle between them are known): The work of the sides and sinus of the corner between them, divided by half. Formula: A = ½AB sin (α), where A- square, a и b- Parties, and α - the angle between them.
• Equilateral triangle: Side, squared, divided by 4 and multiplied by a square root of three.
• Parallelogram: The work of the side and height measured from this side to the opposite.
• Trapeze: The sum of the two parallel sides, multiplied by height, and divided into two. Height is measured between these two sides.
• A circle: The product of the square of the radius and π.
• Ellipse: The product of the semi-axle and π. The surface area of ​​the moon is approximately 3.793 x 10⁷ square kilometers

### Calculation of surface area

Find the surface area of ​​simple bulk figures, such as a prism, you can scan of this figure on the plane. The scan of the ball is so impossible to obtain. The surface area of ​​the ball is found using the formula, multiplying the square of the radius by 4π. From this formula it follows that the area of ​​the circle is four times less than the surface of the surface of the ball with the same radius.

Surface Square Some Astronomical Objects: Sun - 6.088 x 10) Square kilometers; Earth - 5,1 x 10⁸; Thus, the surface area of ​​the Earth is about 12 times less than the surface area of ​​the Sun. The surface area of ​​the moon is approximately 3.793 x 10 ° C for square kilometers, which is approximately 13 times less than the surface area of ​​the Earth.

### Plan meter

The area can also be calculated using a special instrument - a planimeter. There are several types of this instrument, for example polar and linear. Also, the planimeters are analog and digital. In addition to other functions, it is possible to enter into digital plan meters, which facilitates the measurement of objects on the map. The plan meters the distance traveled around the perimeter of the object being measured, as well as the direction. The distance traveled by the plan meter parallel to its axis is not measured. These devices are used in medicine, biology, technician, and agriculture.

## Interesting facts about the square

### Theorem on the properties of the area

According to an isoperimetric theorem, of all figures with the same perimeter, the largest area of ​​the circle. If, on the contrary, compare figures with the same area, then the circle has the smallest perimeter. The perimeter is the sum of the lengths of the side of the geometric shape, or a line that denotes the boundaries of this figure.

### Geographic objects with the largest square View of Evening New York from the 35th floor from the window of the One Un New York Hotel

Country: Russia, 17,098,242 square kilometers, including sushi and water space. The second and third in the country area is Canada and China.

City: New York is a city with the largest area of ​​8683 square kilometers. The second area of ​​the city is Tokyo, which occupies 6993 square kilometers. Third - Chicago, with an area of ​​5498 square kilometers.

City Square: The largest square holding 1 square kilometer is located in the capital of Indonesia Jakarta. This is the Square Medan Merdec. The second largest area of ​​0.57 square kilometers - Praza-Duz-GiSoras in Palmas, in Brazil. Third largest - Tiananmen Square in China, 0.44 square kilometers.

Lake: Geographers argue whether the Caspian Sea is a lake, but if so, then this is the largest lake in the world with an area of ​​371,000 square kilometers. Second on the Lake Square - Lake Top in North America. This is one of the lakes of the System of the Great Lakes; Its area is 82,414 square kilometers. The third in Square - Lake Victoria in Africa. It covers an area of ​​69,485 square kilometers.

List of references

Article author: Kateryna Yuri

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