Shapes Around Us (3D Shapes)

Given: A drum is a cylinder shape — it has two flat circular faces and a curved surface.

Instruments similar in shape (cylinder) to a drum: Tabla and Dholak (both are cylindrical in shape).

Answer: Circle the tabla and dholak (or any cylindrical instrument shown in the picture).

Given: A matka (earthen pot) is similar to a sphere or a rounded/oval 3D shape.

Instruments similar in shape to a matka: Instruments that are round/sphere-like, such as a ghatam (clay pot drum).

Answer: Tick the instrument(s) that are round and sphere-like in shape (similar to a matka).

Given: A shehnai is a wind instrument that is narrow/tubular at one end and wider (cone-like) at the other end.

The shehnai is similar in shape to a cone or a combination of cylinder and cone.

Answer: Tick the cone-shaped option from the choices given.

Given:
- A harmonium is box-shaped (like a cuboid — it has 6 flat rectangular faces, 12 edges, and 8 corners).
- A drum is cylinder-shaped (it has 2 flat circular faces and 1 curved surface, with no corners).

Difference:
- The harmonium has flat faces and sharp corners/edges, like a cuboid.
- The drum has curved surfaces and circular faces, like a cylinder.
- The harmonium has 8 corners, but the drum has no corners.

Answer: The harmonium is shaped like a cuboid (box) with flat faces and corners, whereas the drum is shaped like a cylinder with curved surfaces and no corners.

This is an activity-based question meant for class discussion.

Sample Answer: Yes, I have seen a tabla at home. My grandfather plays it. The tabla is cylindrical in shape. It has two circular flat faces on the top and bottom and a curved surface around it. It is played by beating the top face with hands.

(Students should share their own experiences about any instrument they have seen or played — e.g., drum, harmonium, flute, etc.)

Concept used: Objects in each group share a common 3D shape. The one that does NOT belong to the same shape group is the odd one out.

General approach:
- Look at each group of objects.
- Identify the common shape (e.g., all cylinders, all cuboids, all spheres).
- The object that has a different shape is the odd one out — cross it.

Example: If a group has a tin can, a drum, a pipe, and a box — the box (cuboid) is the odd one out because the rest are cylinders.

Answer: Cross the object in each row that has a different 3D shape from the others in that group.

(Note: Since the actual image is not visible, students should apply the above logic to the objects shown in their textbook.)