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There's a simple answer: The earth is a sphere and the parallels are, well, parallel to each other. So obviously the ones closer to the poles are shorter than the ones closest to the Ecuator.

As for the meridians all meet at one point ehich are the poles, so they are all the same length.

Q: Why aren't all parallels equal in length like meridians are?

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No

-- All meridians of longitude have the same length ... they all join the north and south poles. -- Each parallel of north latitude has the same length as the parallel at the equal south latitude, but no other one.

Yes of course!

Yes they are equal in length

A square has four sides of equal length!

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No

1) all meridians are of equal length; each is one-half the length of the equator 2) All meridians converge at the poles and are true north-south lines 3) all lines of latitude (parallels) are parallel to the equator and to each other 4) parallels decrease in length as one nears the poles 5) meridians and parallels intersect at right angles

-- Parallels are associated with latitudes. Meridians are associated with longitudes. -- Parallels are parallel, and no tweo parallels intersect. All meridians intersect all other meridians, at two places. -- Every point on a parallel has the same latitude. Every point on a meridian has the same longitude. -- Every parallel in the same hemisphere has a different length. Every meridian on Earth has the same length. -- Every parallel is a full circle. Every meridian is a semi-circle. -- Every parallel crosses all longitudes. Every meridian crosses all latitudes. -- The distance between two parallels is the same at every longitude. The distance between two meridians depends on the latitude where it's measured. -- To cross all parallels, you only have to travel 12,000 miles. To cross all meridians, you have to travel 24,000 miles.

Not in length but equal distance from each other

-- All meridians of longitude have the same length ... they all join the north and south poles. -- Each parallel of north latitude has the same length as the parallel at the equal south latitude, but no other one.

Yes of course!

Every meridian of constant longitude is nominally a semi-circle, equal in length to all other meridians, and joining the Earth's north and south poles.

Which of the following is an example of a true-shape map? One showing the distribution of a malaria-carrying mosquitoes worldwide. Airplane pilot's map. One where a coin covers an equal area anywhere on the map. Parallels and meridians do not cross at right angles to each other. Equal-are map.

depending if its octagon regular, or irregular (sides arent equal angles arent equal

Some maps are squashed and stretched in such a way that meridians of longitude appear to be parallel (Mercator projection, for example). But the truth is that on the globe, the meridians all converge at the poles, and so they're not parallel.

lines of equal longitude, a.k.a. meridians

Yes they are equal in length