Page 2 - Lesson Note

Line  A line segment corresponds to the
segment shortest distance between two points.
 It has two end points.
 It has a fixed/definite length.
 The line segment joining points A and B is

denoted by .

Line  A line is obtained when a line segment like
AB is extended on both sides indefinitely.

 It is denoted by or sometimes by a
single small letter like l.
 It has no fixed length.

Ray  A ray is a portion of line that starts from a
point and extends indefinitely in one
direction.
 It has one end point.
 It can be extended in one direction only.
 It is denoted as

Parallel Two lines in a plane are said to be parallel if they
lines do not meet.

Intersecting Two distinct lines meeting at a point are called
lines intersecting lines.

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