"100 degrees west" is the description of a line that joins the north
and south poles, and passes through every possible latitude.
The great circle at 0 degrees latitude is known as the Equator. It is an imaginary line that divides the Earth into the Northern Hemisphere and the Southern Hemisphere.
The Equator
The imaginary great line of 0 degrees latitude is called the Equator. It divides the Earth into the Northern Hemisphere and the Southern Hemisphere.
The Antarctic Circle is a line of latitude -- about 66 degrees S -- beyond which the geography experiences at least one 24-hour period of no sunrise/ sunset per year.
The imaginary circle around the earth that divides it into two halves is called the Equator. It is located at 0 degrees latitude and serves as the starting point for measuring latitude.
The equator (zero latitude) is the only one.
The equator .
Meridians converge at the poles and intersect the equator at 90 degrees. They are all great circle lines called lines of longitude. The equator is a line of latitude and the only line of latitude that is a great circle line. As you move away from the equator the lines of latitude describe smaller and smaller circles round the planet as you approach the poles.
The equator is at 0 degrees latitude, which means it is the line that divides the Earth into the Northern Hemisphere and the Southern Hemisphere. It is the widest part of Earth's surface, and the only line of latitude that is a great circle.
No; neither of the tropics is a great circle. The only line of latitude that is a great circle is the equator. The arctic and antarctic circles are not great circles, either.
Yes
No. You have to cross 360 degrees of meridian for a great circle, so 180 degrees East plus 180 degrees West around the equator will form a great circle.