Many.
Four.
As I have an update media information, Ethiopia has 55 Air plain at this moment.
Parallel lines are equidistant apart and never meet
an octagon.
On a map that uses contour lines to represent height, a flat plain should show very few (if any) contour lines.
Algebra: If given two equations of a line, then you can assume that they are in the same plain. If the two slopes are equal, then the lines are parallel.Geometry: If given two lines in the same plane that never intersect, then these two lines are parallel. If the lines are in different planes, but never intersect, then the lines are skew.So, both definitions use lines and a plane. The answer is yes.
Plain Old Telephone Service
a ruler
In plain geometry, if 2 lines never intersect, they are Parallel
a plain ? what is that ?
A Plain Triangle Has 2 Dimensions.
The word plain has one syllable.