We will discuss here about points and line segment.
We know when two lines meet we get a point.
When two points on a plane surface are joined, a
straight line segment is obtained.
But if two points in a curved surface is joined,
a curved line segment is drawn.
When a line segment is
extended towards both sides unlimitedly it becomes a line.
We make arrows on both end sides of a line segment to represent a line.
Now we may say that a part of the line is known as the line segment. If there is a line l, then AB is a line segment.
A line segment is named by using the names of its endpoints. Then line segment drawn on the side is called line segment AB or line segment BA.
A line does not have any fixed length it has infinite length. But a line
segment has a fixed length. We may imagine a line as it has unlimited length
but a line segment is drawn on a plane paper.
The core of a cuboid or cube is an example of a line segment.
There are many line segments in the following figures:
Note: Line segments may be joined to form geometric figures.
What is one dimensional figure?
A line or a line segment is called one dimensional (1-D) figure.
Types of lines
There are two types of lines.
(i) Straight line
(ii) Curved line
Straight line: If a line shows only one direction, then it is a straight line. It may be vertical, horizontal or slant.
It changes its direction.
Points, lines and line segment are the fundamental concepts in geometry.