This would be a line, which has no width, no thickness and no endpoints, but has infinite length.
A line fits this description.
A plane
A plane.
a point
Plane
A line has infinite length, no width, no thickness, and no endpoints.
It is the parallel lines in Geometry!
No that would be a line
A point has no length, width, or thickness. A line has infinite length but no width or thickness. A plane has infinite length and width but no thickness.
thought
It's a 'line'.
A line fits this description.
A plane
Time has no length, width or thickness.
A line is a figure that has no endpoints. It extends infinitely in both directions, characterized by having length but no width or thickness. In geometry, a line is often represented by a straight path that continues indefinitely, distinguishing it from line segments, which do have defined endpoints.
A point.
If the bar is a three dimensional object it will have some thickness. Then, assuming it is oblong in shape and knowing its length, width and thickness: Surface_area = 2 x (length x width + width x thickness + thickness x length)