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Symmetry Class 7 Notes CBSE Maths Chapter 14 [Free PDF Download]

Q: Q5. Define a) Centre of Rotation b) Angle of Rotation c) Rotational Symmetry.

Here are the definitions of these terms:Centre of Rotation: when an object rotates, it rotates at a fixed point. This fixed point is termed the center of rotation.Angle of rotation: the angle at which an object rotates is called the angle of rotation.Rotational Symmetry: when an object completes one rotation and still looks the same, it is called to have rotational symmetry.You can refer to Vedantu’s Revision Notes for Symmetry for more information on these topics.

Revision Notes

Revision Notes for CBSE Class 7 Maths Chapter 14 - Free PDF Download

Free PDF download of Class 7 Maths Chapter 14 - Symmetry Revision Notes & Short Key-notes prepared by expert Maths teachers from latest edition of CBSE(NCERT) books. To register Maths Tuitions on Vedantu.com to clear your doubts. Register Online for NCERT Solutions Class 7 Science tuition on Vedantu.com to score more marks in CBSE board examination. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for the better solutions ,they can download Class 7 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.

Last updated date: 30th May 2023

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Access Class 7 Mathematics Chapter 14 – Symmetry Notes

Line of Symmetry

When a shape coincides with another shape completely then they are said to have symmetry.
Symmetry can also be observed within a shape. When one part of a shape coincides with another part then they are said to have symmetry within a shape.
The line which divides a shape into two identical parts is called a line of symmetry.
For Example: In the figure below the dotted line is the line of symmetry and left and right part looks identical or symmetrical.

(Image will be Uploaded Soon)

Lines of Symmetry for Regular polygon

Regular polygons are those polygons whose length of all sides and measure of angles are equal.
In regular polygons lines of symmetry are equal to the sides of regular polygons.
For Example:

Triangle has three sides and three lines of symmetry.
Square has four sides and four lines of symmetry.
Regular pentagon has five sides and five lines of symmetry.
Regular hexagon has six sides and six lines of symmetry.

Rotational Symmetry

When a shape is rotated at some angle about its axis clockwise or anticlockwise and after rotation if the shape looks exactly the same as it was before then it is called rotational symmetry.
The fixed point through which the shape is rotated is called centre of rotation.
The angle at which rotational symmetry occurs is called angle of rotation.

The number of times a shape looks the same on rotation is called order of rotational symmetry.

For Example: Order of rotational symmetry of square is 4

Line Symmetry and Rotational Symmetry

There are some shapes which have line as well as rotational symmetry.
Circle is the perfect example of this type; it has infinite line symmetry and can be rotated around its centre through any angle i.e., it has rotational symmetry at any angle.
There are some alphabets also which show both line and rotational symmetry such as H, O, I and X.

FAQs on Symmetry Class 7 Notes CBSE Maths Chapter 14 [Free PDF Download]

Q1. Why should I use Vedantu’s Revision notes for Class 7 Mathematics when I can make my own?

It is always advisable that students make their own notes while studying a chapter. However, it is also beneficial to refer to more professional notes like the Revision Notes by Vedantu for the following reasons:

It gives you an added perspective on your own notes.
Notes provided by our experienced professionals are all-encompassing and perfectly suited for revision.
They provide you with all the significant information crisply and concisely.
They are easily downloadable for free.

Q2. What are the topics mentioned in Vedantu’s Revision notes for Chapter 14 Symmetry of Class 7 Mathematics ?

Our experts have ensured that all the important topics from Chapter 7 "Symmetry" are mentioned in the Revision notes by Vedantu. These straightforward notes mention the significant topics:

Line of Symmetry
Lines of Symmetry for Regular polygon
Rotational Symmetry
Line Symmetry and Rotational Symmetry

These topics are explained comprehensively in Vedantu's Revision Notes for Class 7 Symmetry using suitable examples. They also contain well-suited images to explain the topics wherever necessary.

Q3. What is the charge for downloading Vedantu’s Revision Notes Chapter 14 Symmetry of Class 7 Mathematics ?

The best part of using Vedantu is that most of our services do not cost you a single penny. These include our NCERT Solution, Revision Notes, Sample Papers, Previous Years' Question Papers, Mock Papers, Conceptual Videos, Reference Book Solutions, and Masterclasses for all grades.

To download free notes for Class 7 Mathematics Chapter 14 "Symmetry":

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These solutions are available on Vedantu's official website(vedantu.com) and mobile app free of cost.

Q4. Why should we learn about symmetry?

In Geometry, Symmetry is an important concept. For Class 7 students, this concept makes them keenly observe the objects around them and also apply reasoning skills to them. Symmetry is used in various fields including architecture, design, drawing, tailoring, etc. If you look closely, you can observe several symmetrical objects around you. If you like to paint, sketch, and design then the concepts of this chapter can prove very beneficial to you.

Q5. Define a) Centre of Rotation b) Angle of Rotation c) Rotational Symmetry.

Here are the definitions of these terms:

Centre of Rotation: when an object rotates, it rotates at a fixed point. This fixed point is termed the center of rotation.
Angle of rotation: the angle at which an object rotates is called the angle of rotation.
Rotational Symmetry: when an object completes one rotation and still looks the same, it is called to have rotational symmetry.

You can refer to Vedantu’s Revision Notes for Symmetry for more information on these topics.