How are the equator and prime meridian the same?

Answer 1

Each is the starting place for its form of measurement - the equator for latitude and the prime meridian for longitude.

They are both considered to be '0' or the starting mark for counting in either latitude or longitude. They both go around the earth, even though one goes from North to South, while the other goes East to West.

Answer 2

They're both imaginary lines on the surface of the Earth. Each is the zero reference of one

of the orthogonal geographic coordinates in the common spherical coordinate system.

Answer 3

They both divide the earth

Answer 4

they are