Explanation

• the longitude of the prime meridian is 0 degree
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• Prime Meridian is a zero-degree longitude.
• It is an imaginary line that divides Earth into the Eastern and Western hemispheres.
• It passes through Greenwich in England.
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• Any line of longitude (a meridian) can serve as the 0° longitude line.
• on the opposite side of the prime meridian, the line represents a 90-degree meridian
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