it means three lines a line begins and ends at a point
triangle
The point on a line segment that is equidistant from the ends of the segment. So pretty much a point in the middle of a segment
a ray
The definition of pour point is the lowest temperature at which a liquid begins to turn into a solid, so much so that it can no longer flow.
begins and ends at the same point
A closed figure, like a circle or triangle, begins and ends at the same point.
circle
A circle for example.
a line orOuroboros the snakes that eats it self
polygon I think I would say, it is a circle.
my guess would be the circle; but that continues on and on maybe a point all by itself
A circle perhaps?
A [non-intersecting] closed curve
A segment.
it is a ray
segment