Fatto generale: 200 is degrees in a human"s field of vision (approximately).
Fatto matematico: 200 is the smallest number which can not be made prime by changing one of its digits.
Trivia: 200 is degrees in a human"s field of vision (approximately).
Data storica: July 18th is the day in 1914 that the U.S. Congress forms the Aviation Section, U.S. Signal Corps, giving definite status to aircraft within the U.S. Army for the first time.