Question

what is prime meridian ....???

Answer 1

a prime meridian is a meridian in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its antimeridian form a great circle. This great circle divides the sphere, e.g., Earth, into two hemispheres.

Answer 2

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HERE IS YOUR ANSWER⤵⤵⤵

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➡➡➡PRIME MERIDIAN IS a planet's meridian adopted as the zero of longitude.⬅⬅⬅⬅