Why do you think the Earth’s shape is geoid?
The geoid is a shape like the surface of the Earth. … For many practical purposes, a simpler shape is used because that makes calculations easier. That shape is called a reference ellipsoid. In basic education, the shape of the Earth is described as being like an orange, a sphere but wider round the equator.
I think its geoid because, the earth rotates “ROUND” its axiz.
evidence/proof of earth sphericity(geiod)
1.circumnavigation of earth by ferdinard magellan and his crew between 1519 and 1522
2.sunrise and sunset
The earth is not really spherical because, it is flattened at the North and South poles therefore, it is geoid