Answer :
Final answer:
The line in the middle of a time zone that in theory determines the time of that zone is known as the prime meridian.
Explanation:
The line in the middle of a time zone that determines the time of that zone is called the prime meridian. The prime meridian is an imaginary line that runs vertically from the North Pole to the South Pole, dividing the Earth into the Eastern Hemisphere and the Western Hemisphere.
The prime meridian, which passes through Greenwich, England, is used as the reference point for determining time zones. By convention, each time zone is typically centered around a meridian that is a multiple of 15 degrees away from the prime meridian. For example, the time zone centered on the meridian 15 degrees to the east of the prime meridian is known as UTC+1 (Coordinated Universal Time +1), while the time zone centered on the meridian 15 degrees to the west of the prime meridian is known as UTC-1.
Therefore, the line in the middle of a time zone that determines the time of that zone is the meridian associated with that time zone.
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