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The NCERT Class 7 Maths, Chapter 14 deals with Symmetry. This chapter helps you to understand the concept of symmetry with practical examples to further think upon. You will learn more about the use of symmetry in various fields such as art, architecture, engineering etc. The concept of symmetricity helps you to understand its importance and usage in practical life. You will learn to find the line of symmetry and more about rotational symmetry. This chapter gives a brief idea about symmetry in the objects around you.
To know more about NCERT Solutions for Class 7, Maths Chapter 14, Symmetry, let’s look at the topics and sub-topics of this chapter:
14.1 Introduction
14.2 Lines of Symmetry for Regular Polygons
14.3 Rotational Symmetry
14.4 Line Symmetry and Rotational Symmetry
Section 14.2 – This section deals with lines of symmetry for regular polygons. You will learn that a polygon is a closed figure made of several lines. A polygon is said to be regular if all its sides are of equal length and all angles of equal measure. You will learn about the line of symmetry in these regular polygons. This section also gives practical examples to understand the lines of symmetry in regular polygons.
Section 14.3 – This section deals with rotational symmetry. In this section, you will learn about the clockwise and anti-clockwise rotation of items such as a wheel, hands of a clock etc. You will also learn about the centre of rotation and angle of rotation. In this section, you will learn about the conditions for rotational symmetry.
NCERT Class 7 Maths, Chapter 14 helps one to understand the concept of Symmetry. In this chapter, you will learn about the concept of symmetry in various objects and shapes. You will also learn about the line of symmetry in regular polygons. The number of lines of symmetry in a regular polygon depends on the number of sides in the polygon. You will also learn about the concepts of rotational symmetry and angle of rotation. This chapter helps you to understand the importance and applicability of symmetry in various shapes observed.
Section 14.4 – This section deals with line symmetry and rotational symmetry. In this section, you will learn about both line and rotational symmetry. You will learn that in few shapes only line symmetry can be found and in few, both can be seen. Besides, you will also learn that a circle is the most perfect symmetrical figure because it qualifies for both rotational and line symmetry.
To know more about the NCERT solutions Class 7 Maths, Chapter 14 – Symmetry explore the exercises below:
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