Nets of 3-D shapes
- A three-dimensional shape can be made by folding 2D shapes.
- When a three-dimensional solid is unfolded a two-dimensional shape is obtained.
- Those 2D solids which are used to make a 3D shape are called .
Net of cube
- A cube has 6 faces.
Each face of the cube is a square. Therefore, when a cube is unfolded it
will give 6 squares.
- There are 11 nets of a cube.
- The figure of each net is shown below.
Not every net which has 6 square faces can be folded into a cube.
Net of cuboid
- A cuboid has 6 faces.
Each face of the cuboid is a rectangle. Therefore, when a cuboid is
unfolded it will give 6 rectangles.
- There are 54 different nets of the cuboid.
- Few nets of the cuboid are shown below.
Not every net which has 6 rectangular faces can be folded into a cuboid.
Net of cylinder
- A cylinder has 3 faces.
- Two of the faces are circular and one is rectangular.
Therefore, when a cylinder is unfolded it will give 2 circles and 1
The figure given below cannot be folded into a cylinder.
Net of cone
- A cone has 2 faces.
- One curved face and one flat face.
- A net of cones has two parts:
- One is the circle which represents the flat part.
- The second one is the sector which represents the curved part.
- Therefore, when a cone is unfolded it will give one circle and one sector.
The net given below cannot be folded to a cone.