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1 square kilometer[km²] = 100 hectares [ha]

Initial value

Converted value

square meter square kilometer square hectometer square decameter square decimeter square centimeter square millimeter square micrometer square nanometer hectare ar barn square mile sq. m. mile (US Survey) square yard square feet sq. ft (US Survey) square inch circular inch Township section acre acre (US Survey) ores square chain square genus genus² (US survey) square perch square genus sq. thousandth circular mil homestead sabin arpan cuerda square Castilian elbow varas conuqueras cuad electron cross section tithe (official) tithe household round square verst square arshin square foot square fathom square inch (Russian) square line Planck square

Ferromagnetic liquids

More about the area

General information

Area is a quantity geometric shape in two-dimensional space. It is used in mathematics, medicine, engineering, and other sciences such as computing. cross section cells, atoms, or pipes such as blood vessels or water pipes. In geography, area is used to compare the sizes of cities, lakes, countries, and other geographic features. Area is also used when calculating population density. Population density is defined as the number of people per unit area.

Units

Square meters

Area is measured in SI units in square meters. One square meter is the area of ​​a square with a side of one meter.

Unit square

A unit square is a square with sides of one unit. The area of ​​a unit square is also equal to one. In a rectangular coordinate system, this square is located at coordinates (0,0), (0,1), (1,0) and (1,1). On the complex plane, the coordinates are 0, 1, i and i+1 where i is an imaginary number.

Ar

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

Hectare

Real estate is measured in hectares, especially land plots. One hectare equals 10,000 square meters. It has been used since the times French revolution, and is used in the European Union and some other regions. Just like the are, in some countries a hectare is called differently.

Acre

In North America and Burma, area is measured in acres. Hectares are not used there. One acre is equal to 4046.86 square meters. An acre was originally defined as the area that a peasant with a team of two oxen could plow in one day.

Barn

Barns are used in nuclear physics to measure the cross section of atoms. One barn is equal to 10⁻²⁸ square meters. Barn is not a unit in the SI system, but it is accepted for use in this system. One barn is roughly equal to the cross-sectional area of ​​a uranium nucleus, which physicists have jokingly called "huge as a barn." The barn in English is "barn" (pronounced barn) and from a joke of physicists this word became the name of a unit of area. This unit originated during World War II, and scientists liked it because its name could be used as a code in correspondence and telephone conversations within the framework of the Manhattan Project.

Area calculation

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

Area formulas

• Square: side squared.
• Rectangle: the product of the parties.
• Triangle (side and height known): the product of the side and the height (the distance from that side to the edge), halved. Formula: A = ½ah, where A- square, a- side, and h- height.
• Triangle (two sides and the angle between them are known): the product of the sides and the sine of the angle between them, halved. Formula: A = ½ab sin (α), where A- square, a and b are the sides, and α is the angle between them.
• Equilateral triangle: side squared divided by 4 and times the square root of three.
• Parallelogram: the product of the side and the height, measured from this side to the opposite.
• Trapezium: the sum of two parallel sides times the height and divided by two. Height is measured between the two sides.
• Circle: product of the square of the radius and π.
• Ellipse: product of semiaxes and π.

Calculating surface area

You can find the surface area of ​​simple volumetric figures, such as prisms, by unfolding the figure on a plane. It is impossible to obtain a sweep of the ball in this way. The surface area of ​​a ball is found using the formula by multiplying the square of the radius by 4π. From this formula it follows that the area of ​​a circle is four times less than the surface area of ​​a ball with the same radius.

Surface areas of some astronomical objects: Sun - 6.088 x 10¹² 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 lunar surface area is approximately 3.793 x 10⁷ square kilometers, which is about 13 times less than the Earth's surface area.

Planimeter

The area can also be calculated using a special device - a planimeter. There are several types of this device, for example, polar and linear. Also, planimeters are analog and digital. In addition to other functions, a scale can be entered into digital planimeters, making it easier to measure objects on a map. The planimeter measures the distance traveled along the perimeter of the measured object, as well as the direction. The distance traveled by the planimeter parallel to its axis is not measured. These devices are used in medicine, biology, engineering, and agriculture.

Theorem on the properties of areas

According to the isoperimetric theorem, of all figures with the same perimeter, the most big square by the circle. If, on the contrary, we compare figures with the same area, then the circle has the smallest perimeter. The perimeter is the sum of the lengths of the sides of a geometric shape, or a line that marks the boundaries of that shape.

Geographic features with the largest area

Country: Russia, 17,098,242 square kilometers, including land and water. The second and third largest countries are Canada and China.

City: New York is a city with the most large area 8683 square kilometers. The second largest city is Tokyo, which occupies 6993 square kilometers. The third is Chicago, with an area of ​​5,498 square kilometers.

City Square: The largest area, covering 1 square kilometer, is located in the capital of Indonesia, Jakarta. This is Medan Merdeka Square. The second largest area of ​​0.57 square kilometers is Praça doz Girazois in Palmas, Brazil. The third largest is Tiananmen Square in China, 0.44 square kilometers.

Lake: Geographers dispute whether the Caspian Sea is a lake, but if so, then it is the largest lake in the world with an area of ​​371,000 square kilometers. The second largest lake is Lake Superior in North America. This is one of the lakes of the Great Lakes system; its area is 82,414 square kilometers. The third largest lake is Lake Victoria in Africa. It covers an area of ​​69,485 square kilometers.

square kilometer- - Topics oil and gas EN square kilometersq.km…

square kilometer- measure of areas of the metric system = 1.000.000 sq. meters 0.38610 Imp. sq. miles = 0.87869 sq. versts = 91.5298 tithes; the abbreviated designation of a square kilometer legalized in the USSR: Russian “km2” or “sq. km ", Latin" km2 "...

number of inhabitants per square kilometer- - [A.S. Goldberg. The English Russian Energy Dictionary. 2006] Topics energy in general EN inhabitants per square kilometerinh / km2… Technical translator's guide

- (from the Greek.chilioi thousand, and meter). French linear measure of about 469 rus. soot. Dictionary foreign words included in the Russian language. Chudinov AN, 1910. KILOMETER 1000 meters = 14/15 versts, or 468.7 soot. Complete Dictionary foreign words, ... ... Dictionary of foreign words of the Russian language

The request for "km" is redirected here, see also "KM" Kilometer (abbreviated as km, km) is a widely used multiple of a meter for distance measurement. 1 km = 1000 m = 0.621 miles = 0.9374 miles = 1094 yards = 3281 feet = 1.057 · 10-13 light years ... Wikipedia

Area is a quantity that, in a sense, corresponds to the size of the surface. Contents 1 Formal definition 2 Units of measurement 2.1 Metric units ... Wikipedia

Square kilometer (km², km², sq. Km) area unit, multiple square meter... 1 km² is equal to: the area of ​​a square with a side of 1 kilometer; 1,000,000 m²; 100 hectares; 0.386 102 square miles; 247,105 381 acres. Conversely: 1 m² = 0.000 ... ... Wikipedia

Square kilometer (km², km², sq. Km) is a multiple of square meter for area. 1 km² is equal to: the area of ​​a square with a side of 1 kilometer; 1,000,000 m²; 100 hectares; 0.386 102 square miles; 247,105 381 acres. Conversely: 1 m² = 0.000 ... ... Wikipedia

Abbreviations- And on a bill means that the bill has been accepted. a., arsh. arshin. and ar. a2. square arshin, a3. cubic arshin. an. f. (an. pound) British pound. b. g., b / g next year. b. m., b / m next month. BMO, bm / o without my responsibility ... ... Reference commercial vocabulary

Books

• A traveler enchanted by Switzerland, Novozhilov Konstantin V. Switzerland inherited a nature of unique beauty: the snow-white Alps, emerald lakes, turbulent rivers and waterfalls, majestic glaciers, alpine meadows. At the same time, a country with a population density ...
• Mysterious Places of Russia, Afonkin Sergey Yurievich. People are always attracted to the incomprehensible, mysterious, unknown. It was this thrust that forced the brave captains of past centuries to direct their ships to the horizon. Without striving to reveal ...

If you look into the history of our country, then at first there was a Russian system of measures: a fathom, an arshin, a mile, a verst, a field and others.

These names were borrowed in part from English system measures. But on June 4, 1899, everything changed. A royal decree was issued, according to which the metric system of measures began to be applied in the Russian Empire. People got the meters and kilometers familiar to us.

• 1 meter (m) contains 100 centimeters (cm), 1 m = 100 cm.
• 1 kilometer (km) contains 1000 meters, 1 km = 1000 m.

Multiply 1000 meters by 100 centimeters, we get 1 km = 100,000 cm.

Let's calculate how many millimeters are in 1 kilometer.

1 centimeter = 10 millimeters (mm)

Multiply 10 mm by 10,000 cm. We get 1 km = 1,000,000 mm.

There is another measure of length - decimeter (dm).

1 dm = 10 cm = 100 mm = 0.1 m = 0.0001 km.

The origin of words.

The word kilometer appeared in our language from French from the word kilometer (from the merger of Greek words, translated as thousand and meter)

The word meter originally came from the Greek metron - translated as a measure. And it also came to our language from French (meter).

Check out other interesting questions:

In contact with

classmates

How to convert meters to kilometers?

Distance up to one kilometer is 1000 meters.

How many in a kilometer

Therefore, it is one meter per thousand kilometers:

Therefore, to convert meters to kilometers, the number of meters is divided by 1000.

Formula for transferring meters per kilometer:

Conversion from meters to kilometers will be considered on a case-by-case basis.

Express meters in kilometers:

1) 3 meters;

2) 15 meters;

3) 100 meters:

4) 250 meters;

5) 3500 meters;

6) 12.5 meters;

7) 7 2/9 meters.

To reduce the indicator,

1 km = 1 km;

1 meter = 1 meter.

To convert meters per km, the number of meters is divided by 1000.

The answer can be written either as a regular or as a decimal fraction.

If possible, the normal fraction should be reduced.

When you get the wrong beat, pick the whole part out of it.

When a mixed number is mixed with a mixed mixed number, it converts to an irregular fraction:

Svetlana MikhailovnaEnergetic Dimension

Often, when solving problems of mathematics, and especially in physics, it is necessary to convert km to m. These can be direct problems, such as:

• How many meters are there in 1 km?
• 2 km - how many meters?
• 3 km, how m?
• How many meters are in 4 km?
• For 8 km (7 km) how many m?
• How many meters is 20 km away?
• In 30 km (100 km) how many meters?
• How much is 15 km?
• How much is 4 kilometers?
• How much is 9 km?

The tasks will be a little more difficult when you need to translate N km and M m v meters, for example, the following types of tasks can be as follows:

• How many meters is 9 km and 900 meters?
• How many meters are there for 3 km and 5 m?
• How many meters per 1 km 3 m?
• For 5 km 6 m, how many m?

Separately, we can highlight the problems in which the number should not be translated, but the numbers in the form of decimal fractions.

• How many meters is 1.5 km away?
• 1.4 km, how many meters?
• How many meters per 1.2 km?
• How many meters is 2 5 km?

In meters (m), how many kilometers (km)?

In practice, for example, it is necessary to solve the inverse problems of converting from meters to kilometers.

• How many miles are 5 meters?
• How many miles is 20 m?
• And 100 m - how many kilometers?
• At 10 m, how many kilometers?
• In 1 m, how many kilometers?
• At 250 m, how many kilometers?
• How many miles are 30 meters?
• At a distance of 500 m, how many kilometers?

Kilometers and meters are units of measure for length and distance

To understand how to go the course of kilometers in meters and back, and this is very easy, we will turn to theory.

Kilometers, like meters, are units of length and distance.

And now more about each unit.

kilometers Is an abbreviation for km, a unit of distance and length.

Formula for transferring kilometers per meter:

1 km = 1000 m

meter- abbreviated as m, also a unit of length and distance. In SI (International System of Units - one of the most widely used in the world), this metric is one of seven basic units.

By definition, a meter is transported by light for 1/299 792 458 seconds in a vacuum.

Formula for transferring meters per kilometer

1 m = 0.001 km = 1/1000 km = 10 ^ (-3) km

In the above formula, the expression written is the same, only using different notation forms.

How many kilometers are N km?

Let's try to figure out how many meters are in kilometers in the above applications.

Let's start.

How many kilometers are N meters?

We are now thinking about inverse problems in finding the number of cubes in this number of liters.

Convert km to meters online

With the formulas above, using a regular calculator, you can easily convert kilometers to meters and vice versa.

But for your convenience, we suggest using our online calculators.