Because it began as a kicking-oriented game and is one of the world's football codes, along with association football (soccer), Rugby football, Gaelic football, and Australian rules football.
An American football, a rugby football and an Aussie rules ball are all prolate spheroids (pointed ovals). A soccer ball is a sphere.
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One.
The only reason that I can think of is that you want to communicate with a person who is not familiar with the English system - football rules measure the field in yards or feet, so square meters is an unnatural measure for them.
A lot
There are many different rules for playing football as a kid. While some of them are the same as in the National Football League, most are revised for younger players.
What kind of football? American football, Association Football or Australian Rules?
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The commissioner decides on the rules in football.
Circle rules football was created in 2006.
Football has the fewest rules out of sports. Football = Soccer
it
yes they are...the English football assocation wrote the rules for football in 1863
There are so many rules that even people who grew up playing and loving the game do not know. There is a reason why there are "laws" of the game in soccer (association football) and that you never hear this term mentioned in American football. In short, no one I have ever asked this question has been able to answer.
Rugby Ice Hockey, Football, and Curling Australian rules, Gaelic football
In short: the same rules as every other league. All football leagues are bound by the rules of Association Football, these rules are administered and enforced by FIFA at international level and their own football associations internally.