Fun with Symmetry
CBSE · Class 4 · Mathematics
Flashcards for Fun with Symmetry — CBSE Class 4 Mathematics. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is symmetry?
Answer
Symmetry means that when a shape or design is divided by a line, both halves are exactly the same. The two halves are like mirror images of each other.
What is a line of symmetry?
Answer
A line of symmetry is an imaginary line that divides a shape or design into two equal halves that are mirror images of each other. It is also called the axis of symmetry.
How do you test if a shape has a line of symmetry?
Answer
You can test by folding the shape along the line. If both halves match exactly when folded, then it is a line of symmetry. You can also use a mirror - place it along the line and see if the reflection…
Which letters of the English alphabet look the same in a mirror?
Answer
The letters A, H, I, M, O, T, U, V, W, X, Y look the same when you place a vertical mirror. These letters have vertical symmetry.
Which numbers from 0 to 9 have the same mirror image?
Answer
The numbers 0, 1, and 8 look the same in a vertical mirror. Number 0 is oval-shaped, 1 is a straight line, and 8 has vertical symmetry.
Why are words written backwards on ambulances?
Answer
Words on ambulances are written backwards so that when drivers look in their rear-view mirror, they can read the word 'AMBULANCE' correctly and know to give way to the emergency vehicle.
How many lines of symmetry does a circle have?
Answer
A circle has infinite (unlimited) lines of symmetry. Any line passing through the center of the circle divides it into two equal halves.
How many lines of symmetry does a square have?
Answer
A square has 4 lines of symmetry: 2 diagonal lines and 2 lines through the middle (one vertical and one horizontal).
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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
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