How is football and soccer related?

Answer 1

They are related in the foundations of the two sports. American football is derived from the sport Rugby.

Both Rugby and Soccer are related as there was a disagreement on the set of rules which was going to be created (around 1863). This led to a split in the original committee into the Football Assosiation (otherwise better known as FA) and the Rugby Football Union (known as RFU).

Apart from the origins of the sports, they share few relations, the most prominent being the pitch.. The Pitch for soccer, American Football and Rugby are the same size.