NCERT Solutions for Class 4th Maths Chapter 11 Bablu Chacha’s tiles — Tiles at the Tile Shop
Book page 171 Updated on2026-09-19
Q1.
Bablu Chacha makes beautiful tiles of the kinds shown below. Design creative tiles of your own in the spaces given below. You may use a rangometry kit or shape cutouts.Tiles of the kinds Bablu Chacha makes.
Answer
Bablu Chacha’s tiles are hexagons and squares filled with smaller shapes.
Tiles of the kinds Bablu Chacha makes: hexagons and squares filled with triangles and rhombuses.
Trace the empty hexagon or square from the book.
Take triangles and rhombuses from your rangometry kit.
Fill the shape completely — no gaps and no overlaps.
Colour the pieces, then draw round them in your notebook.
Sample answer: I filled one hexagon with 6 triangles and coloured them orange and yellow by turns. I filled the square with 8 triangles, blue and yellow by turns.
Tip: A hexagon is filled neatly by 6 triangles, or by 3 rhombuses, or by 2 trapeziums and 2 triangles.
Q2.
Which shapes have you used to make the tiles?
Answer
The tiles are built from a few simple shapes.
Bablu Chacha’s tiles, made from triangles and rhombuses.
Small shape used
Sides
Where you see it
Triangle
3
The hexagon cut into 6 pieces; the pinwheel square
Rhombus (diamond)
4
The hexagon made of 3 pieces
Trapezium
4
Half a hexagon
Square
4
The outer shape of the last two tiles
Sample answer: I used triangles and rhombuses to make my tiles.
Why it happens: These shapes have equal sides that match each other, so they sit together leaving no gaps.
Q3.
Which of the tiles are symmetrical? Draw the lines of symmetry (if any).
Answer
A tile is symmetrical only if the colours match on both sides of the fold, not just the shapes.
Bablu Chacha’s tiles. Look at the shapes and the colours together.
Tile
Symmetrical?
Lines of symmetry
Hexagon with 6 differently coloured triangles
No
0
Hexagon with two orange shades by turns
Yes
3
Hexagon with a six-pointed star
No
0
Hexagon with 3 rhombuses of 3 colours
No
0
Square pinwheel of 8 triangles
No
0
Green square with turning bands
No
0
Only the second tile is symmetrical. Its three lines run from the middle of one side to the middle of the opposite side.
Sample answer: My hexagon with orange and yellow triangles by turns has 3 lines of symmetry, each one running from a corner to the opposite corner.
Why it happens: A fold must match colour to colour. In a pinwheel each triangle leans the same way round the centre, so folding puts a blue piece on a yellow piece — there is no line of symmetry.
Check it yourself: Colour the same hexagon in only one colour. Now it has 6 lines of symmetry, because only the shapes have to match.
Q4.
Make more tiles by joining two or more shapes. Trace them in your notebook to create paths with no gaps or overlaps.
Answer
Join two or three cutouts into one bigger tile, then repeat that tile to make a path.
Join 2 triangles along one side — you get a rhombus.
Join 3 triangles in a row — you get a long trapezium.
Trace your new tile again and again along a line in your notebook.
Check after every tile: no gap, no overlap.
Sample answer: I joined 2 triangles into a rhombus and traced it 10 times to make a garden path.
Why it happens: When two shapes are joined along equal sides, the new tile still has straight matching edges, so copies of it fit together.