## RS Aggarwal Solutions Class 7 Chapter-18 Reflection and Rotational Symmetry (Ex 18A) Exercise 18.1 - Free PDF

## FAQs on RS Aggarwal Solutions Class 7 Chapter-18 Exercise 18.1

**1. What is the difference between Line Symmetry and Rotational Symmetry according to RS Aggarwal Solutions Class 7 Chapter-18 Exercise 18?**

A figure has line symmetry if there is a line about which the figure is folded in such a way that the two parts of the figure will coincide.

Some shapes may not have line symmetry, but they will look similar if they get rotated by 90 or 180 degrees around their centre. It is called rotational symmetry. E.g. Windmill blades.

Some figures may have both line symmetry and rotational symmetry. For example, a square has both.

**2. What are the important terms related to rotational symmetry?**

When we turn an object, it rotates about its fixed point; that point is the centre of rotation. The Centre of Rotation is among the most common and important terms to keep inside your mind when you take on rotational symmetry. And one more term to remember is the Angle of Rotation; the Angle of Rotation is nothing but the angle by which the object rotates. If you rotate an object by 180 degrees, it is half-turned, and for 90 degrees, it is a quarter turn.

**3. Where can I find other resources regarding Reflection and Rotational symmetry according to RS Aggarwal Solutions Class 7 Chapter-18 Exercise 18?**

Vedantu is one of the few and only platforms on which you can find the resources related to RS Aggarwal class 7 chapter 18 Reflection and Rotational Symmetry. Maths experts of Vedantu have made these solutions to all the exercise questions covered in the book. All you need to do is sign in with your genuine email id or mobile number. You can find other helpful items like previous papers and sample papers of different classes that will benefit you in ace your examination.

**4. Is online study helpful for class 7?**

Yes, it is helpful. You can attend the classes from home and clear your doubts from the experts of each subject. Also, it is convenient for students of primary or secondary class as they cannot travel afar because of their parents’ jobs. Vedantu provides an online study program designed for class 7 where you will learn the existing syllabus in a new, different manner, i.e. with 3D visual graphics.

**5. What is the role of symmetry?**

The study of symmetry is required because of its frequent use in day-to-day life and more because of the excellent designs it can provide us. You see in your surroundings that symmetrical things are easy to decode and understand. Some shapes have an only line of symmetry, some have rotational, and a few may have both. This topic will help you in the future if you choose to be a civil engineer or an architect.