Question

Important latitude on the earth surface

Answer 1

A circle of latitude on the Earth is an abstract east–west circle connecting all locations around the earth (ignoring elevation) at a given latitude. Circles of latitude are often called parallels because they are parallel to each other – that is, any two circles are always the same distance apart. A location's position along a circle of latitude is given by its longitude. Circles of latitude are unlike circles of longitude, which all are great circles with the centre of Earth in the middle, as the circles of latitude get smaller as the distance from the Equator increases. Their length can be calculated by a common sine or cosine function. The 60th circle of latitude is half as long as the equator (disregarding Earth's minor flattening by 0.3%). A circle of latitude is perpendicular to all meridians.

Answer 2

equator is the important latitude on earths surface