Social Sciences, asked by MOHNAJIH, 17 days ago

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Answered by makkalmandalam
0

Answer:

a) geoid

b)

→ Thales believed that earth is a sphere that floats on water

→ Greek philosophers, Pythagoras and Aristotle established that the earth      is spherical in shape.

→  Magellan's voyage round the world proved that the earth is spherical and spins on an imaginary axis.

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