An infinite number.
plane
400
Points and lines on the same plane are coplanar.
There are 91 lines.
In a plane, only one.
plane
36
Yes- planes contain infinitely many points and every pair of points in plane determine a line in that plane, so every plane contains infinitely many lines.
infinite number of lines
20 regions
Lines in the same plane that do not intersect Lines in the same plane that do not intersect Lines in the same plane that do not intersect Lines in the same plane that do not intersect
It has 2 lines of sym
400
Either 0 or 1 plane(s).
Points and lines on the same plane are coplanar.
3 lines and one plane
There are 91 lines.