Football, a sport, is mainly dominated by the foot. The two teams conduct offense and defensive sports on the same venue.It is the most loved, most extensive and most influential sports in the world, and is known as the "worlds first movement."
The birth of modern football
Since the middle and late 17th century, football has gradually introduced from Europe and the United States to countries around the world, especially in some developed countries.More and more people go to the stadium and devote themselves to this exciting and pleasant movement, so that the football movement is good or bad as a sign to measure the development of a countrys culture.In this case, the British first made important contributions to the development of football.
On October 26, 1863, the British established the worlds first football association -England Football Association at the Fromson Hotel in Queens Street, London.In addition to the official establishment of the England Football Association at the meeting, it has formulated and passed the worlds first unified football competition rules, and recorded in text.
The birth of the England Football Association marks the development of football in a new stage.Therefore, it is recognized that on October 26, 1863, the day of the establishment of the England Football Association was the birthday of modern football.
Rules of football
Venue area
The competition venue should be rectangular, and its length should not be more than 120 meters or less than 90 meters, and the width is not more than 9O meters or less than 45 meters. In any case, the length must exceed the width.
The game venue shall draw clear lines according to the plane drawing. The width must not exceed 12 cm, and it shall not be made into a "V" groove.
Goal
At the goal line of 5.50 meters on the inside of the ball post, draw a 5.50 meter long line to each vertical line with each end of the goal line.The areas of these three lines and the goal line are called the goal area.
Penalty area
At the goal line of 16.50 meters in the inside of the ball post on both ends of the game field, draw a 16.50 meters long line on the field with vertical lines, one end to the goal line, and the other end to draw a connection line and the goal line parallel parallel to the goal line.The area within the range of these three lines and the goal line is called a free throw area. At the two -ball goal, the two -ball goal line is vertically marked at 11 meters at 11 meters in the field.
Corner
With the intersection of the side and the goal line as the center of the center, with 1 meter as the radius, a quarter of the arc is drawn to each section of each section of the field. This arc area is called an corner area.
The goal should be located in the center of each goal line, consisting of two horizontal horizontal wood connections of 7.32 meters apart, equivalent to the west corner flag, upright door column and a level of 2.44 meters from the ground.If you are fixed goals or mobile goals, you must be firmly fixed on the venue.
Gauge
The ball should be made of the ball. Its shell application leather or other licensed materials is made of no longer than 70 cm (28 inches), not as short as 68 cm (27 inches), and the weight is not more than 450 grams at the beginning of the game.(16 British two), no less than 410 grams (14 British two)
Regulations on the number of players
There should be two teams to participate in a game, and there must be no more than 11 players in each team, of which one must be the goalkeeper.If any team is less than 7, the game cannot start.
Substitute program
Before the bench, the referee should be notified. The bench can only enter the field from the middle line when the game stops. The players who have been replaced by the bench must not participate in the game again.Power.
Illegal/penalty
The bench players entered the game venue without permission of the referee: stop the game; warn the substitute players and present the yellow card to leave the game venue; re -start the game where the ball is falling at the place where the ball stops, and any other violates this to violate this.Rules: The relevant players will be warned and show the yellow card.
How to divide the size of football
The No. 1 ball is often used as a decoration or palm. The size is about the size of the palm. The specific value does not specify.
The No. 2 ball is slightly larger than the No. 1 ball, and most of them are playing balls for young children. In fact, the distinction between No. 1 ball is not too obvious, because there are no specific regulations.No. 3 football began to have strict size limits.
No. 3 football is mostly used as a child training ball. Because for children 5-12, the regular 4 and No. 5 ball are too large, which is not conducive to childrens training. Generally, it is 18cm in diameter.
No. 4 football is mainly facing 5 -player events and 7 -player events, or on the field football, as well as cage football balls popular in Europe and the United States. Some of the 9 -player games also use this ball.Generally around 20cm, it is common between 19.8cm-20.4cm. At the same time, No. 4 balls are mostly trained and small games for young and middle age teenagers.
No. 5 football, that is, common regular football, is mostly used for adult events and training, that is, 11 people, 9 people, in some field events, and their size is not as delicate to centimeters.The size of the 1 cm diameter has the size. However, the size of the ball for regular large-scale events is between 68.5cm-69.5cm, that is, 20.8-21.4cm.The diameter of the 5th ball of the second -class and third -class products will float the size of 0.3 cm each.
The No. 7 ball is relatively rare, generally the size of a formal basketball, and is mostly used for special purposes, such as display, ornaments.

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