ray
Also called half-line. It is a straight line that extends from a point.A set consisting of a point P on a straight line and all of the points of the line on one side of P.

The point P is the initial point or origin of the ray. A ray can be called a b>closed half-line since it includes the initial point P. An open half-line does not include the initial point P.


Related Term: line


 
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