Tangent
Two points. These may coincide if the line is a tangent to the sphere.
A Vertex is the point of intersection, and a Perpendicular Vertex is a vertex with all 90 degree angles, to be specific.
a line
It's a line... on a sphere...
a bisecting line ? Diameter ______________ The question needs to be re-thought. Lines do not cut spheres in half, no matter where the line is in the sphere. The simplest thing that can cut a sphere in half would be a plane.
Two points. These may coincide if the line is a tangent to the sphere.
A line. When two planes intersect, their intersection is a line.
A line.
an intersection
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.
A Vertex is the point of intersection, and a Perpendicular Vertex is a vertex with all 90 degree angles, to be specific.
a line
The coordinate plane is formed by the intersection of a vertical and a horizontal number line. What is the horizontal number line called?
Intersection
the back boundary line, and the long service line
is called an edge.
Two planes that intersect are simply called a plane to plane intersection. When they intersect, the intersection point is simply called a line.