Question

What is the longest latitude

Answer 1

Answer:

The longest is the equator, whose latitude is zero, while at the poles, at latitudes 90° north and 90° south (or –90°), the circles shrink to a point.

Answer 2

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This results in Earth’s rotation making the Equator bulge somewhat. The equator is the longest line of latitude, at 40,075 km. As you go north or south from there, they keep getting shorter until you approach the poles. One degree north or south, the line is about 40,0069 km.