Question

what is prime meridian or Greenwich meridian​

Answer 1

Answer:

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Explanation:

A prime meridian is the meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. This great circle divides a spheroid into two hemispheres. If one uses directions of East and West from a defined prime meridian, then they can be called the Eastern Hemisphere and the Western Hemisphere.

Answer 2

Answer:

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Greenwich meridian:

the prime meridian, which passes through the Royal Observatory at Greenwich in London. It was adopted internationally as the zero of longitude in 1884.

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