NCERT Solutions for Class 3 Maths Chapter 2 Toy Joy (PDF) – 2027

I drew a puppy face on a bottle (cylinder), a pig face on a box (cube), a cat face on a long box (cuboid) and a bird face on a paper cone.

Jaya has used 4 kinds of shapes: cone, cube, cylinder and cuboid.

• Cone — the pink tip at the top.
• Cube — the purple block and the blue block.
• Cylinder — the big orange block.
• Cuboid — the flat blocks around the base.

In all, 2 + 4 + 1 + 1 = 8 blocks.

The orange cylinder is between the red cuboid and the yellow cuboid.

The yellow cuboid is on the left and the red cuboid is on the right.

The blue cube is on the top of the orange cylinder.

It sits on the flat top face of the cylinder.

The purple cube is under the pink cone.

The cone is the top block. The small purple cube is just below it.

I collected a carton, a matchbox, a bottle, a paper cap and a ball.

Straight edges: carton and matchbox. Curved edges: bottle and paper cap. The ball has no edge.

1. A big carton (cuboid) at the bottom — the room.
2. A cone on it — the roof.
3. Two bottles (cylinders) at the sides — pillars.

From far away I can see only the faces turned towards me. The back and bottom faces are hidden.

In all, 1 + 2 + 1 + 1 = 5 shapes.

Every toy is made by joining two or more shapes.

I put a paper cone on a bottle to make a hut. I put a cone on a box to make a house with a pointed roof. I kept the wide, flat box at the bottom.

The cuboid is at the bottom. The cylinder is on the cuboid. The cone is on the cylinder.

Write each classroom object under the shape it looks like.

Sample answer: Cuboid.

Books, the duster, the geometry box, the desk top, the door and the blackboard are all cuboids.

Sample answer: Cone.

I found only a birthday cap and a funnel. Some classrooms have no cone at all.

• Pencil — a cylinder with a cone at the tip.
• Water bottle — a big cylinder with a small cylinder cap.
• Table — a cuboid top with cylinder legs.
• Globe — a sphere on a stand.

There are 13 shapes. Each one gets its mark.

The round yellow shape is a sphere. It gets no mark.

Sphere. A sphere has no edges.

A ball is a sphere. Run your finger over it. You never feel an edge or a corner.

Cube and cuboid.

Each has 6 faces, and all of them are flat.

Sphere.

A ball, a marble and an orange are spheres. Their whole outside is one curved face.

Cylinder and cone.

• The round rim at the bottom is a curved edge.
• The line down the side looks straight.

Cylinder and cone.

I can build shapes with only straight edges, like a cube or a cuboid.

• First frame: 4 clay balls and 6 sticks.
• Second frame: a cube (or cuboid) with 8 clay balls and 12 sticks.

First shape: 8 cubes. You can see 7. One cube is hidden at the corner, under the tall part.

Second shape: 5 cubes. Stand 3 cubes one above the other. Join 1 cube in front of the middle cube and 1 behind it.

If you roll a 3, move your counter to the next cone picture.

Same: all five are solid shapes. Each one takes up space.

Different: their faces are different, and only some of them roll.

The face opposite 1 has 6 dots.

The face opposite 2 has 5 dots.

The face opposite 3 has 4 dots.

So the three pairs on a die are 1 and 6, 2 and 5, 3 and 4.

The numbers on opposite faces always add up to 7.

One number goes up by 1 and the other goes down by 1.

1. Keep 2 cuboid blocks on the ground.
2. Lay a flat cuboid plank on them.
3. Stand 4 cylinders on the plank.
4. Put another cuboid plank on the cylinders.
5. Put 4 cones on the top plank.

The 3 small cuboids under the middle make steps, from big to small.

You get a bigger cuboid.

Join the cube to the end face of the cuboid. The new shape has 6 flat faces, so it is a cuboid.

21 cubes. Count layer by layer.

You can see 14 cubes. 7 more are hidden under them.

In 2 different ways.

1. All three in a straight line — a long cuboid.
2. Two in a line and the third at the side — an L shape.

Two shapes: a long cuboid (3 cubes in a line) and an L shape.

All four models use only cuboids.

1. (a) Orange at the bottom, two green on it (one out on each side), a small yellow between them, red on top.
2. (b) 5 in a column with a wide green one on top — like a T.
3. (c) 6 stacked, red and orange by turns — a tower.
4. (d) 3 stacked, each pushed a little to one side — like steps.

(a) A cuboid — 3 dice in a row, and 3 more on top.

(b) A tower — 6 dice one on another.

(c) Sample answer: steps — 3 in a row, 2 on them, 1 on top.