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Chapter 10 of 15
Revision Notes

Symmetrical Designs

CBSE · Class 5 · Mathematics

Quick revision notes for Symmetrical Designs — CBSE Class 5 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

45 questions20 flashcards4 concepts

Key Topics to Revise

1

Reflection Symmetry and Lines of Symmetry

  • Reflection symmetry means a shape looks exactly the same when folded along a line
  • The fold line is called the line of symmetry or axis of symmetry
  • Some shapes have vertical lines of symmetry (up-down fold)
2

Rotational Symmetry

  • Rotational symmetry means a shape looks the same when turned around a center point
  • We measure turns in fractions: 1/4 turn (90°), 1/2 turn (180°), 3/4 turn (270°), full turn (360°)
  • A firki (windmill) has rotational symmetry as it looks the same after 1/4, 1/2, and 3/4 turns
3

Symmetry in Numbers and Alphabets

  • Digits with reflection symmetry: 0, 1, 3, 8 (vertical); 0, 8 (horizontal)
  • Digits with rotational symmetry: 0, 1, 6, 8, 9
  • Digits with both symmetries: 0, 1, 8
4

Creating Symmetrical Designs

  • Paper cutting technique: fold paper, draw half/quarter design, cut, and unfold
  • Designs can have only reflection symmetry, only rotational symmetry, or both
  • Block printing uses symmetrical patterns repeated multiple times

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Full Notes

Key Concepts

A shape has reflection symmetry whenA shape has rotational symmetry whenImaginary lines that divide a shapeThe specific angles (like 90°

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Frequently Asked Questions

What are the important topics in Symmetrical Designs for CBSE Class 5 Mathematics?

Symmetrical Designs covers several key topics that are frequently asked in CBSE Class 5 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.

Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.