Lines of longitude are of some length.Why ?
Answers
Only the lines of longitude are of equal length. Each line of longitude equals half of the circumference of the Earth because each extends from the North Pole to the South Pole. The lines of latitude are not all equal in length.
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Lines of longitude can be thought of as the trace of an infinite plane on the surface of the Earth, but those planes pass through both the north and south poles, as well as the center of the earth. Although Earth is not a perfect sphere, it’s close enough, and therefore any plane that passes through both poles will yield an intersection trace on the surface of similar length.
The imaginary infinite planes whose traces on our globe form lines of latitude, on the other hand, do not pass through the poles, and the only one that passes through the center of the Earth is the Equator, giving it the longest linear distance of any latitude. Lines of latitude to the north and south of the equator can be thought of as planes parallel to the equator which form smaller and smaller circles of intersection with the Earth as they get closer to the poles.
In other words, all the planes that intersect the globe and form longitude lines intersect in a line that is the global axis of rotation. But the planes that form latitude lines do NOT intersect with each other, they are parallel.
Only the lines of longitude are of equal length. Each line of longitude equals half of the circumference of the Earth because each extends from the North Pole to the South Pole. The lines of latitude are not all equal in length. Since they are each complete circles that remain equidistant from each other, the lines of latitude vary in size from the longest at the equator to the smallest, which are just single points, at the North and South Poles.
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