Going for 42 sats here. learn something new. ok here goes.

latitudinal lines are parallel slices of the earth defined by the line that runs from the south pole to the north pole.

longitudinal lines are not parallel. the distance between them vary depending on your latitude. Bigger at equator, 0 at the poles.

going for 42 more:

the earth is not a sphere, it is an ellipsoid. NS radius differs from ew radius. when the flat earthers claim the earth is not a sphere, they are technically correct. The best kind of correct.