Question

Why the earth is of geoid shape not of any other shape ​

Answer 1

Explanation:

There are many reasons why the geoid isn't a sphere. First and foremost, the Earth itself isn't a sphere. It is closer to an ellipsoid, being flattened at the poles by the centrifugal force of its own rotation. But the planet isn't an ellipsoid either, because of topography.

if you are seeing photos of the Earth and it appears ellipsoid , then the images seen by you are distorted, because the difference between the form of our Earth and a perfect sphere is really small

therefore the shape of The Earth is geoid

and not a perfect sphere

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