What's another word for longitude? what is another name for it?

The lines from pole to pole are constant.The circles are parallel to the equator.The latitude and longitude of points on the surface are shown in the graticule.

What is another word for hemisphere?It's a word.Synonyms.There is a cerebral hemisphere neural structure in the left brain.

The prime meridian is the measurement east or west.There are imaginary lines that run around the Earth and meet at the North and South Poles.These lines are called meridians.There is a distance around the Earth.