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RS Aggarwal Class 7 Solutions Chapter-18 Reflection and Rotational Symmetry

Last updated date: 23rd Apr 2024
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Class 7 RS Aggarwal Chapter-18 Reflection and Rotational Symmetry Solutions - Solutions

Mathematics is the gateway to the logic of quantity, shapes, and arrangements. Today, the academic curriculum is filled with complex theories and concepts. Students are often in the habit of procrastinating Maths as a complex or diplomatic subject. Therefore, they even have great difficulties to solve their academic textbook's problems. There are specific chapters in which the student suffers a lot to develop a deep understanding. RS Aggarwal Reflection and Rotational Symmetry Class 7 is one of those challenging chapters. The students are often confused about the concepts of this chapter. Vedantu comes with RS Aggarwal Solutions Class 7 Maths Chapter 18 Solutions as a saviour for these students to score well in the examination. It presents the solutions in a step-by-step format to help the students develop a deep understanding.


Register Online for Class 7 Science tuition on to score more marks in CBSE board examination. Every NCERT Solution is provided to make the study simple and interesting on Vedantu. is No.1 Online Tutoring Company in India Provides you Free PDF download of NCERT Maths Class 7 solved by Expert Teachers as per NCERT (CBSE) Book guidelines. All Chapter wise Questions with Solutions to help you to revise complete Syllabus and Score More marks in your examinations.

RS Aggarwal Maths Chapter 18 Solution PDF

We have provided step by step solutions for all exercise questions given in the pdf of Class 7 RS Aggarwal Chapter-18 Reflection and Rotational Symmetry. All the Exercise questions with solutions in Chapter-18 Reflection and Rotational Symmetry are given below:

Exercise (Ex 18A) 18.1

Exercise (Ex 18A) 18.2

Students often wonder how to get the perfect guide for them to conquer the world of Mathematics. So, they often suffer from understanding complex theories and concepts, which develops fear and discouragement. There is only one path to counter this situation, i.e., practice. A good mathematician stands on the pillars of practice. Students must practice problems of every genre to dismantle a concept. If students find any difficulty to solve the diplomatic questions, they may refer to the RS Aggarwal Solution Class 7 Maths Chapter 18. These solutions provide a handy mechanism to understand the concepts and score well in examinations. So, let's explore various aspects of the RS Aggarwal Reflection and Rotational Symmetry Class 7


Reflection is one of the most vital as well as interesting chapters of Mathematics. It deals with various aspects of light. The chapter involves various observations on the light when it strikes different surfaces and calculations to explore more light concepts. Reflection is some specifically the observations of light and its properties.

The word reflection can be quoted as the casting of visual elements in a specific direction. In Class 7, Mathematics Syllabus, the students elaborated on the complex laws and properties light possesses while undergoing reflection.

In RS Aggarwal Class 7 Maths Ch 18 Solutions PDF, the students are introduced to various calculations on types of reflection such as – specular reflection, multiple reflections, and diffused meditation. The solution comprises an elaborated view of the laws and theorems of reflection.

The laws of reflection and their efficient implementation solve various problems in the vital point of this chapter. The laws of reflection of light are states that –

● The rays of light, i.e., Incident ray, the reflected ray, and the normal, lie in the same plane.

●  The Angle of incidence = Angle of reflection

In this chapter, the students develop a deep understanding of the formulas of the reflection of light. The students must build a strong core of learning by referring to the RS Aggarwal Class 7 Maths Chapter 18 Reflection Solution.

Rotational Symmetry

Rotation Symmetry, also quoted as radial symmetry, can be defined as an object's property to look identical after a complete or partial rotation. For instance, if we notice a windmill, it appears to be symmetrical, and if we rotate the windmill at a 90-degree angle about a rigid point, we will observe the windmill seems the same. Therefore, we can conclude that it has rotational symmetry. 


Rotation is the phenomenon that turns a substance about a specific point, and that point is referred to as the centre of rotation. The object possesses an angle while rotating, which is quoted as the Angle of rotation. And if an object appears identical multiple times during a 360-degree rotation, it is known as the order of rotational symmetry. For instance, let's take the example of a tyre; if we rotate the tire at 90 degrees to complete a full rotation, it appears identical four times, which is referred to as the order of rotational symmetry tyre.


Students often get across some of the objects with one line of symmetry like alphabet E, or rotational symmetry. In this chapter, the students vividly view the various aspects of rotational symmetry to solve the problems’ respective topics and concepts conveniently. They must also refer to RS Aggarwal Solutions Class 7 Maths Chapter 18 to practice various questions.


RS Aggarwal Solutions Class 7 Maths Chapter 18 Preparation Tips

  • Students must stress understanding the concepts and the theories of the topic, rather than jotting down their textbooks.

  • Students must be well aware of all the formulas in the chapter and know where to apply them to output the best results.

  • Students must follow a strict schedule to invest the maximum of their time, studying and exploring different questions.

  • Students must stick to the rule of practice, they must refer to different problems and past year’s question papers to solve them and build a solid hold on the concepts.

FAQs on RS Aggarwal Class 7 Solutions Chapter-18 Reflection and Rotational Symmetry

1. What are the Types of Reflection?

There are three divisions of reflection - 

  • Regular Reflection or specular reflection

  • Diffused Reflection

  • Multiple Reflection 

2. What is Rotational Symmetry? explain with an example.

A figure has rotational symmetry if the image agrees with the preimage when rotated by an angle between 0° and 360°. The number of times the figure coincides with itself as it rotates through 360 degrees is the order of symmetry. A regular hexagon, for example, has rotational symmetry. The property of an object to look identical following a complete or partial rotation is also known as rotation symmetry.

3. How Does Vedantu Provide the Best Online Study Material?

The study materials or the solutions of different chapters in Vedantu are carefully designed by top-notch expert faculties, under the supervision of an efficient team of Vedantu. The answers are prepared on the principles provided by the CBSE Board and are strictly oriented towards giving the students quality education on different topics.

4. What is the difference between reflection and Rotational Symmetry?

An object has reflectional Symmetry similar to alphabets that may be right/left (imagine putting a mirror on the vertical line dividing the letters), like the letters: 


Or possible it can have reflectional Symmetry that may be up/down (imagine putting a mirror on the horizontal line dividing the letters) like the letters:,D,C,E,B,K

Or a letter may have both up and down and left/right reflectional symmetry. like the letters:X,O,H,I,. 

Rotational symmetry is a type of symmetry in which you can envision turning an object, or a letter, fewer than 360 degrees and it will still match up. Rotational symmetry is shared by the four letters that have both left/right and up/down symmetry, as well as those letters that do not have reflectional symmetry, such as S and Z.

5. What is the easiest way to solve symmetry ?

You must first determine whether the equation is written in standard form or vertex form in order to calculate the line of symmetry algebraically. y = ax2 + bx + c is the standard form, where a, b, and c are all real numbers. To find the line of symmetry, apply the formula x = -b / 2a. Geometry, nature, and shapes are all based on symmetry. It generates patterns that assist us in conceptually organising our reality.