NCERT Maths Mela, Class 4, textbook pages 164–174

How to teach Class 4 Maths Chapter 11, Fun with Symmetry, at home

Lines of symmetry and mirror images, taught with things you already have at home: a 10-minute activity, a game for the week, a 5-day plan and the mistakes to watch for.

a square:4 lines ofsymmetry

NCERT Class 4 Maths Chapter 11 Fun with Symmetry: what it teaches

Your child finds lines of symmetry by folding, draws the missing half of shapes, uses a mirror to check, and makes paper-cut designs by folding a paper twice for more than one line of symmetry.

Why it matters later. Symmetry is used in geometry, art and science, and prepares for reflections in Class 6 and 7.

See it: this chapter in pictures

Cut on a fold, open it: one line of symmetry.
count squares from the line
Count squares away from the line to draw the other half.
AHFTF has no line of symmetry
Test letters with a mirror.

You need

  • paper squares
  • scissors
  • a small mirror
  • squared paper

Tonight’s 10 minutes

  1. Fold a paper square in half, cut a shape along the fold and open it.
  2. Fold a paper twice, cut, and open: how many fold lines of symmetry?
  3. Draw half a shape on squared paper; your child completes the other half.
  4. Hold a mirror on the letters of your name. Which letters stay the same?

Words to use

  • symmetry
  • line of symmetry
  • mirror half
  • fold
  • reflection

Watch for

  • Drawing the missing half shifted, not mirrored. Count squares from the line of symmetry on both sides.
  • Thinking a rectangle has diagonal lines of symmetry. Fold a rectangle along its diagonal: the halves don’t match.

What it sounds like at home

A short example of the conversation. Your words will differ; the questions are what matter.

YouFold this square. How many ways can you get matching halves?

Your childDown, across… and both corners.

YouSo how many lines?

Your child4.

YouDoes a rectangle fold on its corner line?

Your childNo, it doesn’t match.

A game for this week: Mirror half

  1. Draw half a picture on squared paper along a line.
  2. Your child draws the other half.
  3. Check with a mirror on the line.
  4. Swap roles with harder shapes.

A 5-day plan, 10 minutes a day

  1. Day 1Fold and cut a symmetrical shape.
  2. Day 2Fold twice for four parts.
  3. Day 3Complete half-drawings.
  4. Day 4Mirror letters.
  5. Day 5Mirror half game.

Everyday moments to practise

  • Rangoli designs.
  • Butterflies and leaves.
  • Letters on signboards.
  • Paper-cut decorations.

Quick check

Ask these at the end of the week. Tap to see the answer.

How many lines of symmetry does a square have?

4.

Does the letter F have a line of symmetry?

No.

Folding a paper twice and cutting gives how many matching parts?

4.

Ready for the next chapter when your child…

  • Finds lines of symmetry by folding.
  • Completes a symmetrical drawing.
  • Knows a square has 4 lines of symmetry.

Activities, wording and illustrations are Mathify Kids’ own, following the topics of NCERT’s Maths Mela (Class 4). See the full Class 4 parent guide for every chapter.

Questions parents ask

What is a line of symmetry?

A line that divides a shape into two matching halves.

How many lines of symmetry does a square have?

4.

Which letters are symmetrical?

Letters like A, H, M, O, T, U, V, W, X, Y have at least one.