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Lines of latitude are all parallel to each other, and are parallel to the horizon on many printed maps.
A projection with parallel latitude lines and parallel longitude lines is known as a cylindrical projection. This type of projection preserves the shape of features along the equator and distorts them towards the poles. Examples include the Mercator and Miller cylindrical projections.
A triangle can have no parallel lines.
there are 36 lines of latitude respectively
A pentagon has no parallel lines.
it has too parallel lines!
A cone does not have any parallel lines
how many sets of parallel lines are in a triangle
A square has 2 pairs of opposite parallel lines.
"Zero latitude" is the line closest to the equator, because it's the definition of the equator itself. Once you leave the equator, there's no such thing as the "closest line". Any parallel of latitude you draw, no matter how close it is to the equator, I can always draw one that's closer. There's no 'official' set of lines. You can draw as few or as many lines as you want, wherever you want them.
2 pairs of parallel lines
A cube has exactly 6 parallel lines.