A cube has 6 faces, 12 edges and 8 corners.
The sides of a cube are equal in length. All faces are square in shape.
A cuboid has 6 faces, 12 edges and 8 corners.
The opposite sides of each face are equal in length.
All faces are rectangular in shape.
A cylinder has 3 faces.
There are 2 flat faces and 1 curved face.
It also has 2 round edges.
A cone has two faces. One is a plane face and the other is a curved face. It has one round edge and 1 vertex.
A sphere has only 1 curved or round face.
Exercise 4.2
A. Fill in the blank.
- A sphere has one _____________.
- A cone has one _____________ edge.
- The opposite sides of each face is _____________, in a cuboid.
- A cuboid has _____________ faces, _____________edges.
- A cylinder has _____________ edges.
B. Complete the table below.
| Faces | Edges | Corners | |
| Cube | 6 | ||
| Cuboid | 8 | ||
| Cylinder | 2 | ||
| Cone | 1 | ||
| Sphere | 0 |
C. Determine the type of face that the following solid objects have. First one is done for you.
| 1. | Dice | – | Flat |
| 2. | Pencil box | – | ______________ |
| 3. | Water bottles | – | ______________ |
| 4. | Football | – | ______________ |
| 5. | Ice cream cones | – | ______________ |
| 6. | Books | – | ______________ |
D. Look at the objects below and write down their shapes.
