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38
NFL RULES
The Field
Every NFL fi eld measures 100 yards in length with lines painted every 10 yards, and hash marks
every yard. The end zones are an additional 10 yards and are located at both ends of the fi eld.
Timing
A game is divided into four 15-minute quarters, separated by a halftime break after the second
quarter. The teams switch sides of the fi eld after each quarter, and both halves of football begin
with a kickoff. If the game is tied at the end of the 4
th
quarter, a sudden death overtime period
begins with possession determined by a coin toss.