Fun with Symmetry
CBSE · Class 4 · Mathematics
Summary of Fun with Symmetry for CBSE Class 4 Mathematics. Key concepts, important points, and chapter overview.
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Overview
Symmetry is a balanced and pleasing arrangement. A shape or pattern is symmetrical when one half matches the other half in some way. In this chapter, symmetry appears in ink designs made by folding and pressing paper, paper-cut designs, mirror games with shapes and words, tile patterns, wall pattern
Key Concepts
An ink design made by folding
An ink design made by folding paper and spreading colour can form a symmetrical pattern. The two halves match each other when folded along the middle.
The line of symmetry is
The line of symmetry is the line that divides a design into two equal halves. When a shape is folded along this line, both sides match exactly.
A design can be made by
A design can be made by folding paper and cutting it. One design is made by folding a paper twice and cutting at the corner. Another design is made by
A mirror can show the other
A mirror can show the other half of a shape, number, or word. Some numbers keep the same look in the mirror, and ambulance letters are written in a sp
Floor patterns made with tiles must
Floor patterns made with tiles must have no overlaps and no gaps. A tile design can be repeated, turned, slid, or flipped to make a pattern.
Learning Objectives
- Understand what symmetry means in shapes and patterns.
- Identify the line of symmetry in a design.
- Recognise symmetrical and non-symmetrical shapes.
- Use a mirror to study reflection in numbers, shapes, and words.
- Understand how tiles can make patterns with no gaps or overlaps.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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