Types of Lines

What are the different types of lines?

All plane shapes are made up of straight or curved lines or combination of both.

Straight Line and Curved Lines

There are two different kinds of lines.

1. Straight line:

Straight lines are shown below.

Straight Lines

2. Curved line:

Curved lines are shown below.

Curved Lines

1. Straight Lines:

Observe the edge of this page. Place a ruler along its edge. All its edges are straight line. Straight lines may be drawn in different directions and are given three names. There are three different types of straight lines:

(i) Horizontal lines: The lines drawn horizontally are called horizontal lines.

Horizontal Lines

(ii) Vertical lines: The lines drawn vertically are called vertical lines.

Vertical Lines

(iii) Oblique or slanting lines: The lines drawn in a slanting position are called oblique or slanting lines.

Oblique or Slanting Lines

The explanations on different types of lines will help the kids to understand the difference between the straight lines and the curved lines and how the lines are drawn in different directions in geometry.

Types of Lines

2. Curved Lines:

It is an object similar to line but not straight.

Curved Lines

Let us understand the lines with an activity.


Andrew wanted to understand the straight lines and curved lines. His teacher told him to write his name in capital letters and observe each letter carefully.


A          N         D         R         E         W


Andrew was happy that his name contains alphabets made up of different types of lines. 

Alphabets A, N, E and W are written with horizontal, vertical and slanting lines.

Alphabets like D and R are written with curved lines.

Questions and Answers on Straight Lines and Curved Lines:

1. Observe the number train carefully. Cross the numbers which are made up of only straight lines, tick the numbers which are made up of only curved lines and circle the numbers which are made up of both straight and curved lines.

Straight Lines and Curved Lines

2. In the given picture color the horizontal lines blue, slant lines red, vertical lines orange and curved lines green. Also write the number of lines in the given space.

Curved Lines and Straight Lines

Number of Horizontal Lines = __________

Number of Vertical Lines    = __________

Number of Slant Lines       = __________

Number of Curved Lines    = __________

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Points, Lines and Shapes

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