great circles
that would be a line and lines do not exist in spherical geometry
8
Two.
It is called Parabolic Line Design
great circles
great circles
Lines in spherical geometry are very easy to understand. Lines in spherical geometry are straight looking items that can be found by graphing points in a certain pattern.
great
that would be a line and lines do not exist in spherical geometry
Arcs or curves.
yes
8
Two.
A line in Riemann's spherical geometry is called a great circle, which is the intersection of a sphere with a plane passing through its center. Great circles are the equivalent of straight lines in this non-Euclidean geometry.
In plane geometry, the geometry of a flat surface, parallel lines by definition never meet. However in spherical geometry, the geometry of the surface of a sphere (such as the planet Earth) parallel lines meet at the poles.
segments, lines, and rays.