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I just read about latitudes and longitudes. I read latitudes are imaginary lines that run around the earth and longitudes are lines that run around from top to bottom.

Using this system:

1. How is exact position determined in degrees?   
2. Why is the equator represented as zero degrees?
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migrated from Jun 28 '12 at 22:11

This question came from our site for active researchers, academics and students of physics.

Feels like a homework question – Nathan W Jun 28 '12 at 23:29
There are several ways to approach this question. Are you perhaps looking for something like – whuber Jun 29 '12 at 13:30

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