Symmetry
CBSE · Class 6 · Mathematics
Summary of Symmetry for CBSE Class 6 Mathematics. Key concepts, important points, and chapter overview.
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Overview
Symmetry is the idea of repeated parts arranged in a definite pattern. A figure is symmetrical when parts of it repeat in a clear way. Some figures match after folding, and some match after turning about a fixed point. Symmetry is found in many shapes such as a flower, butterfly, rangoli, pinwheel,
Key Concepts
Symmetry is a repeated pattern
Symmetry is a repeated pattern in a figure. A figure is symmetrical when parts of it repeat in a definite way.
A line of symmetry cuts
A line of symmetry cuts a figure into two parts that exactly overlap when folded along the line.
A figure that has a line
A figure that has a line of symmetry is also said to have reflection symmetry.
Some figures have more than one
Some figures have more than one line of symmetry. A square has 4 lines of symmetry.
A figure has rotational symmetry when
A figure has rotational symmetry when it looks exactly the same after being rotated through an angle strictly between 0° and 360°.
Learning Objectives
- Identify symmetrical and non-symmetrical figures
- Understand a line of symmetry and reflection symmetry
- Find lines of symmetry in common figures
- Understand rotational symmetry and the centre of rotation
- Find angles of symmetry for different figures
Frequently Asked Questions
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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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