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Chapter 9: Symmetry Notes

Home / Class Notes / Class 6 / Maths / Chapter 9: Symmetry
✓ Free notes Class 6 Maths 1 study file

About these notes

Class 6 Maths Chapter 9 Symmetry notes give clear definitions, diagrams and stepwise methods to identify and draw mirror images. Main sub-topics: line of symmetry and fold test, symmetry counts for square, rectangle, circle and regular polygons, symmetry in alphabets and patterns, drawing symmetric shapes using grid or tracing. These notes are written for CBSE and Bihar Board Class 6 students to aid school exam revision, chapter test practice and site-wide mock tests on Merit Spring ROH; search the site for important questions, MCQ and question answer to strengthen revision.

Key points you will learn

  • Class 6 Maths Chapter 9 Symmetry notes: line of symmetry definition and fold test
  • Definition: A line of symmetry divides a figure into two mirror halves (each point and its image are equidistant from the line)
  • Count lines of symmetry: square 4, rectangle 2, circle infinite, equilateral triangle 3, regular n-gon has n
  • How to draw mirror image: fold test, use a grid or draw perpendiculars to the symmetry line
  • Symmetry in letters and patterns: identify vertical and horizontal symmetry for alphabets and designs
  • Tips: Always test by folding or reflecting points across the line; watch out for rotational vs mirror symmetry
  • Common mistakes: confusing congruent halves with mirrored halves and miscounting symmetry lines for irregular shapes

What is inside this chapter

📄

Symmetry - Chapter 9 Notes (Class 6 Maths)

Class 6 Maths Symmetry - Chapter 9 handwritten-style revision notes for CBSE and Bihar Board students.

📥 Open notes

Questions students ask

What is symmetry in Class 6 Maths?

Symmetry means a figure can be folded along a line so both halves match exactly; this line is called the line of symmetry. Examples include mirror images, symmetric alphabets and many regular polygons.

How many lines of symmetry does a square have?

A square has 4 lines of symmetry: two diagonals and two lines through midpoints of opposite sides. Each line divides the square into two congruent mirror halves.

How do I draw the mirror image of a shape?

Draw the suspected line of symmetry first, then for several key points measure equal perpendicular distances on the other side and join corresponding points to form the mirror image.

Where can I find Class 6 Maths Chapter 9 Symmetry notes and important questions?

Open the Symmetry - Chapter 9 Notes page on Merit Spring ROH for the chapter notes; use the site search to locate important questions, MCQ and extra practise material.

Are there MCQ and chapter tests for Symmetry on Merit Spring ROH?

Merit Spring ROH offers chapter tests and site-wide mock tests you can use for practise; search the site for MCQ sets and chapter test options to check your preparation.

← Previous chapter Chapter 8: Playing with Constructions

More Maths chapters

Chapter 1: Patterns Mathematics Chapter 2: Lines and Angles Chapter 3: Number Play Chapter 4: Data Handling and Presentation Chapter 5: Prime Time Chapter 6: Perimeter and Area All chapters →

Class 6 — other subjects

English Science Social Science