NCERT Solutions for Class 7 Maths Chapter 14 Symmetry

 

NCERT Solutions for Class 7 Maths Chapter 14  Symmetry- Symmetry is an important concept of geometrical part, commonly exhibited in nature and also it is used in almost every field of activity. The idea of symmetry used by car manufacturers, artists, designers of jewelry or clothes, architects, etc. In this chapter, there is a total of three exercises with 19 questions. The NCERT Solutions for Class 7 Maths Chapter 14  Symmetry are prepared and solved by our experts as per the CBSE syllabus. NCERT Solutions for Class 7 Maths is the best study material which provides solutions of each and every question present in the class 7 NCERT Book for Maths subject. These NCERT solutions help students in their preparation of CBSE final exams and various national level competitive exams.

The tree-leaves, the beehives, religious symbols, the flowers, handkerchiefs, and rugs everywhere we find various types of symmetrical designs. In NCERT Class 7 Maths Chapter 14  Symmetry we will discuss line symmetry, lines of symmetry for regular polygons and rotational symmetry. The "Line of Symmetry" is defined as the imaginary line or axis that passes through the centre of the object or shape and divides it into two perfectly identical halves. Rotational symmetry is symmetry when an object or shape is rotated around a centre point (fixed point) by a number of degrees and the object or shape looks exactly the same. In a complete turn of 360-degree, the number of times an object or shape looks exactly the same is called the order of rotational symmetry. The order of symmetry for an equilateral triangle is 3 and the order of symmetry for a square is 4.

Regular polygons like a regular hexagon, regular pentagon, square etc have equal sides and equal angles. They have more than one lines of symmetry. Number of lines of symmetry of some regular polygon are given in the following table-

Regular polygon

Regular hexagon Regular pentagon     Square       

Equilateral triangle

No. of lines of symmetry

               6               5           4

              3

Topics of NCERT Grade 7 Maths Chapter 14  Symmetry

14.1 Introduction

14.2  Lines of Symmetry for Regular Polygons

14.3  Rotational Symmetry

14.4  Line Symmetry and Rotational Symmetry

The complete Solutions of NCERT Class 7 Mathematics Chapter 14 is provided below:

 

NCERT Solutions for Class 7 Maths - Chapter-wise 
 

Chapter No.

Chapter Name

Chapter 1

Integers

Chapter 2

Fractions and Decimals

Chapter 3

Data Handling

Chapter 4

Simple Equations

Chapter 5

Lines and Angles

Chapter 6

The Triangle and its Properties

Chapter 7

Congruence of Triangles

Chapter 8

Comparing Quantities

Chapter 9

Rational Numbers

Chapter 10

Practical Geometry

Chapter 11

Perimeter and Area

Chapter 12

Algebraic Expressions

Chapter 13

Exponents and Powers

Chapter 14

Symmetry

Chapter 15

Visualizing Solid Shapes

 

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