line segment
The universe.
line
The metric of a geometric space is defined as the distance between two points.
Circle
Parallel lines could fit the given criterior
2D line.
Line segment.
The universe.
line
The shortest distance between any two points is called displacement.
Points are the only such objects.
parabola
Circle
The metric of a geometric space is defined as the distance between two points.
line segment
Parallel lines could fit the given criterior
circle