Opposite rays
From the term “opposite” which is derived from the Latin word “oppositus” meaning “set against”, Opposite Rays are two rays which start from one common point and is pointed outwards in an exact opposite direction from each other forming a straight line.
For example, this is Line A <<<+========== ;
this is Line B ==========+>>>
Line A and Line B are two rays but they can only be called Opposite Rays when they both start from a common point which is Letter O; thus, forming a straight line.
A <<<+========== O ==========+>>> B
When there are opposite rays, points A, O, and B are collinear, meaning these points are present in the same straight line.