## CBSE Class 7 Maths Chapter 14 Symmetry Revision Notes

If you are looking forward to scoring excellent marks in your Class 7 Maths Exams then it becomes very significant to understand the importance of Revision. Revision is very important as it helps you remember all the important chapters and co-related concepts that you have learned earlier and for the purpose of Revision, Revision Notes are always considered the best as they make your learning easy and convenient.

Chapter 14 of CBSE Class 7 Maths is Symmetry. Swiflearn offers the best and most reliable CBSE Class 7 Maths Chapter 14 Symmetry Revision Notes that will make students understand all the important topics & concepts of this chapter and will help them in higher studies also. Free CBSE Class 7 Maths Chapter 14 Symmetry Revision Notes provided here are prepared under the auspices of our Excellent Teachers keeping in mind the latest CBSE guidelines.

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**Symmetry**

**Introduction**

When two or more parts are identical after folding or flipping then they are called as in symmetry.

**Line of Symmetry**

It is imaginary line which is divides a image in two equal part.

It can be horizontal or vertical.

*Example *

The letters A, X and U are vertical symmetric while B and K have horizontal symmetry

There could be one or more than one line of symmetry in a figure.

The Line of Symmetry can be in any direction.

**Reflection Symmetry**

Reflection symmetry is the symmetry in which a figure divides itself into two halves such that one-half is the mirror image of the other half.

**Rotational symmetry **

A figure has rotational symmetry if it can be rotated by an angle between 0° and 360° so that the image coincides with the pre-image.

The angle of rotational symmetry is the smallest angle for which the figure can be rotated to coincide itself.

**Point Symmetry**

When a shape is rotated 180° it looks the same or it looks same when turned upside down

**Centre of Rotation **

If a figure rotates at a fixed point then that point is the centre of Rotation.

**Note**

Some shapes have only line symmetry and some shapes have only rotational symmetry but there are some shapes which have both types of symmetry.

**What is the centre of an Object?**

The centre of a shape or object with rotational symmetry is the point around which the rotation occurs.

**Order of Symmetry**

It is the number of times an object or shape can be rotated and still look like it did before rotation began.

*Example *

Order of Parallelogram is 2

Order of rhombus is 2

### CBSE Class 7 Maths Chapter 14 Symmetry Revision Notes PDF