Number of rays that can be drawn from a given point is

Number of lines that can be drawn through a given point.

A ray AB is symbolically written as.

A ray has _____ end points.

is a

A line EF is symbolically written as.

A line segment is bisected at O. Then length of    is

Number of point of intersection of two parallel lines.

Set of points extending infinitely in all direction on the same flat surface is

Which of the following has no length, breadth, height or thickness.