8 collinear points determine 28 unique line segments
If each segment intersects exactly two other segment but could, if extended, intersect the third, then the figure is a quadrilateral. Otherwise it is a parallelogram.
Opposite Rays - are collinear rays having the same endpoint.
It is an angle.
a triangle
Two collinear rays that do not intersect are called parallel rays. This will only occur for a short time, however, because they will intersect at some point.
Oppsite rays
Opposite Rays
Polygon
A vertex.
It's an angle.
-- Two rays with a common endpoint form an angle. -- If they have a common endpoint, then they are collinear. So I guess, technically, the conditions described in the question aren't possible.
10 collinear points form one set of overlapping line segments, of which there are 45.
8 collinear points determine 28 unique line segments
What about them?These are known as opposite rays. They form a line.
a triangle is formed by line segments that connect two non-collinear points
angle