Question

what term is used for the imaginary east west horizontal lines on the earth

Answer 1

these are called latitudes

Answer 2

The horizontal imaginary lines on Earth are called latitudes. (parallel lines around the Earth, present in the Northern and Southern Hemispheres )[Eg. 90°N, 23°S)

While, the vertical imaginary lines are called longitudes. (unparallel lines starting and ending at the poles.) [Eg. 90°E,23°W]