Lines

What is a Line?

A line is a thin shape with only length and no breadth. We can say that the line can be extended in both directions and it has no ends.

Types of Lines

• Straight Line

A straight line is a line that does not bend. The straight lines are shown below:

It is the shortest possible path between any two places.

For example, the aeroplane lands in a straight line.

• Curved Line

The curved line is a line that is not straight and has curves. The curved lines are shown below:

For example, the path of the aeroplane move is a curved line.

• Horizontal Line

A horizontal line can be defined as a straight line that goes from left to right.

For example, the car is resting horizontally.

• Vertical Line

A vertical line is always one that extends upward or downward from bottom to top. Vertical lines that run vertically include standing lines as well. The vertical line is shown below:

For example, the building stands vertically.

• Parallel Lines

The term "parallel lines" refers to lines that are on the same plane which always maintain an equal distance from one another and never cross over one another. They can be both horizontal and vertical. The parallel lines are shown below:

For example, a train track and a racing track run parallel.

• Intersecting Lines

Intersecting lines are lines that cross or meet at some point. They can be two or more lines that have exactly one point in common. The point where these lines meet or their point of junction is the "point of intersection". The intersecting lines are shown below:

For example, the roads intersect each other.

• Perpendicular Lines

Perpendicular lines are lines that meet at a right angle, forming an "L" shape. A horizontal and vertical line that intersects each other indicates that they are perpendicular to one another. The perpendicular lines are shown below:

For example, the wickets and a lamp post are standing perpendicular to the ground.

Example: Select the odd one.

a)
b)
c)
d)

Answer: c)

Explanation: Figures in options (a), (b) and (d) are made of straight lines.

The figure in option (c) is made of curved lines that are not straight.

Example: Which of the following is NOT intersecting lines?

a)
b)
c)
d)

Answer: d)

Explanation: In options (a) and (c), the roads intersect each other.
In option (b), the road and railway intersect each other.
In option (d), the road and railway tracks are parallel.