Question

why are the lines of longitudes are also called meridians​

Answer 1

Explanation:

Longitudes are known as meridians because in Geographical sense, meridians are great circles which are not parallel to each other but intersect each other at the North and the South Poles

Answer 2

Answer:

longitude are also known as meridians because in geographical sense meridians are great circle which are not parallel to each other but intersect each other at North and the South poles