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1. Which of the following net(s) can be folded to form a cuboid?

( a) ( b) ( c) ( d)

2. Draw the following shapes on the given dot grids.

( a) a scalene triangle (b) a right-angled triangle (c) an equilateral triangle

Solid ShapeS

3D shapes are solid shapes or objects that have three dimensions (length, width, and
height), as opposed to two-dimensional objects which have only a length and a width.
Some examples of 3D shapes are cubes, cuboids, cones and cylinders.

Cube Cuboid Cylinder Cone
Nets of Solid Shapes

A net is a 2D shape that can be obtained by opening out a 3D shape.
Look at the unfolding of an empty cubical box.

A cubical box
Net of the cubical box
Nets of a Cube

A cube is a 3D shape in which all the faces are squares. It has six faces, eight corners and
twelve edges. Some nets of a cube are shown below.

Cube

If you fold each of the above nets, you will get a cube.

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