find out the equatorial diameter and polar diameter of the earth from the internet hence calculate the equatorial circumference and polar circumference of the earth. Compare the two. ???;Please answer the question please
Answers
Earth's circumference is the distance around Earth. Measured around the poles, the circumference is 40,007.863 km (24,859.734 mi). Measured around the Equator, it is 40,075.017 km (24,901.461 mi).[1]
Measurement of Earth's circumference has been important to navigation since ancient times. The first known scientific measurement and calculation was done by Eratosthenes, who achieved a great degree of precision in his computation.[2] Treated as a sphere, determining Earth's circumference would be its single most important measurement.[3] Earth deviates from spherical by about 0.3%, as characterized by flattening.
In modern times, Earth's circumference has been used to define fundamental units of measurement of length: the nautical mile in the seventeenth century and the metre in the eighteenth. Earth's polar circumference is very near to 21,600 nautical miles because the nautical mile was intended to express one minute of latitude, which is 21,600 partitions of the polar circumference (i.e. 60 × 360). The polar circumference is also close to 40,000 kilometres because the metre was originally defined to be one 10-millionth of the circumferential distance from pole to equator. The physical length of each unit of measure has remained close to what it was determined to be at the time, but the precision of measuring the circumference has improved since then.
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