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.
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Key Topics to Revise
1. Lines of Symmetry in Letters
- Reflection symmetry was studied in Grade 4, and it helps in making letter cutouts.
- Letter A has a vertical line of symmetry.
- Letter H has two lines of symmetry: vertical and horizontal.
2. Making a Firki and Checking Rotational Symmetry
- A firki is made from a square paper.
- The paper is folded diagonally to form triangles.
- It is opened and folded the other way to make more triangles.
3. Dots, Letters, and Turns
- Dots are marked on letters to track orientation while checking rotational symmetry.
- A letter has rotational symmetry if it looks the same after a turn.
- One letter in the chapter is shown to have rotational symmetry after half a turn.
4. Symmetry in Digits and Numbers
- Digits can also be checked for reflection symmetry and rotational symmetry.
- Some digits have reflection symmetry.
- Some digits have rotational symmetry.
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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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