Wikipedia nonsense - meridian and metre: Difference between revisions
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==Overview== | |||
Combining facts from the Wikipedia articles "History of the metre" and "Meridian" yields an earth circumference of around 80 000 km. | |||
==Details== | |||
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Meridian (geography) - Wikipedia, the free encyclopedia | Meridian (geography) - Wikipedia, the free encyclopedia |
Revision as of 2014-04-08T12:59:19
Overview
Combining facts from the Wikipedia articles "History of the metre" and "Meridian" yields an earth circumference of around 80 000 km.
Details
1)
Meridian (geography) - Wikipedia, the free encyclopedia en.wikipedia.org/wiki/Meridian_(geography) Wikipedia A meridian (or line of longitude) is the half of an imaginary great circle on the Earth's surface
2)
History of the metre - Wikipedia, the free encyclopedia en.wikipedia.org/wiki/History_of_the_metre Wikipedia 1⁄10,000,000 part of the quarter of a meridian
From 2:
1 m = 1⁄10,000,000 of the quarter of a meridian
Insert 1:
1 m = 1⁄10,000,000 of the quarter of a (half of an imaginary great circle on the Earth's surface)
Reduce
1 m = 1⁄10,000,000 of 1/4 of 1/2 of imaginary great circle on the Earth's surface 1 m = 1/80,000,000 of imaginary great circle on the Earth's surface
Reformulate
imaginary great circle on the Earth's surface = 80,000,000 m = 80,000 km
Compare that with:
Equator - Wikipedia, the free encyclopedia en.wikipedia.org/wiki/Equator Wikipedia Other planets and astronomical bodies have equators similarly defined. Earth's equator is about 40,075 kilometres (24,901 mi) long