Question

Which of the following are great circles?

Options

• Lines of Longitudes

• Lines of Latitudes

• Equator

• Both Lines of Longitudes and Equator

Answer 1

Both Lines of Longitudes and Equator

Explanation:

1. Lines of Longitudes: All lines of longitude (meridians) are great circles because they pass through the Earth's center and divide it into two equal halves.
2. Equator: The Equator is a great circle because it is equidistant from the North and South Poles, and it divides the Earth into two equal hemispheres.
3. Lines of Latitudes: Only the Equator is a great circle among the lines of latitude. Other latitudes, like the Tropic of Cancer or the Arctic Circle, are small circles as they do not divide the Earth into two equal halves.