The lines on the globe drawn from pole to pole, crossing the equator and having the same length are called …

Lines that hypothetically extend from one geographic pole to another are called meridians. Meridians, unlike parallels, have the same length, which is exactly 20004 kilometers. There are twenty-four of them, and each of them corresponds to one time zone. And time zones are considered starting from the zero or Greenwich meridian. Also, using the meridians, the coordinates of geographic objects, more precisely, longitude, are determined.