Why is the equator defined as 0 degrees? *A bit urgent*?

Question

I was asked of why is the equator of Earth is made 0 degrees. I know that it's an imaginary line, therefore it's only defined as 0 degrees by people. But why?What are some of the mathematic and scientific reasons?

Answer 1

the equator was chosen because it's the midway point between the 2 poles and as a starting point it was designated as 0 then they count north and south - it's somewhat arbitrary but makes sense - kinda like time zones - more specifically designating Greenwich Mean Time as the basis - chosen because it falls on the Prime Meridian - seemed like a good starting point - I guess that makes it more of a logical decision than an arbitrary one.

Answer 2

Every thing has to have a starting and stopping point. How far East can you go, from 0 to 180 degrees. how far West. from 180 to 0 degrees. How far South 0 to 180 degrees and North 180 to 0 degrees. You can only go one direction by 180 degrees. This is had to understand, at the equator cut the world in half you have two parts each being 180 degrees. now cut the world in half the other way you have two parts 180 degrees each. so you can say the world is cut into 8 parts, and each of these parts would be 90 degrees by 90 degrees. Look at the parts as being triangles. put 4 top points together bend them into a circle. you have 4 trinagle bases 90 degrees each making 360 degrees. This is the equator. 0 degrees to 360 degrees. 0 and 360 being the same in a circle.

Answer 3

The Equator is an imaginary circle drawn around a planet (or other astronomical object) at a distance halfway between the poles. The equator divides the planet into a Northern Hemisphere and a Southern Hemisphere. The latitude of the equator is, by definition, 0°.

Just because it's midway between the poles.
Not really any other reason for it.

Answer 4

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Answer 5

The latitude corresponds with the angle with the vertical that the sun makes at noon on summer solstice.
At the equator, the sun at noon on summer solstice is directly overhead, 0 degrees away from the vertical.

Answer 6

Since all the heavenly bodies appear to move parallel to the equator, it makes incredibly good sense to lable it as 0° latitude, otherwise you'd have to add or subtract its value from your astronomical observations.

Answer 7

The equator is not made up by people. It is the widest part of the Earth, and divides the hemispheres.

Answer 8

It's just a convention, convenient for calculation. Any number could have been chosen; zero has the virtue of simplicity.