Circle articles
What condition must a plane satisfy to create a great circle when intersecting a sphere?
How does the radius of a great circle compare to the radius of the sphere it lies upon?
What do lines of longitude, such as meridians on Earth, represent geometrically?
If two points chosen on a sphere are antipodal, how many great circles can pass through both?
Which terrestrial example is cited as the most famous great circle on Earth?
What geometric feature distinguishes a great circle from any other circle drawn on a sphere?
What is the term for the shortest path between two points along the surface of a sphere?
How many unique great circles are defined by two distinct, non-antipodal points on a sphere?
What are most lines of latitude, such as the Tropic of Cancer, classified as geometrically on Earth?
In the mathematical definition of a great circle plane ($ax + by + cz = 0$), what does the vector $(a, b, c)$ represent?