Page 84 - Maths Class 06

Let us look at the cylinder, the cone and the sphere.

(i) (ii) (iii)
Fig. 5.23
These have no straight edges.

The base of the cylinder and cone is a circle.
The sphere has no flat faces at all.

Nets of Solids

Suppose we want to make solid shapes by cutting out paper and folding it. It is possible to do so. But we
must know the shape of paper to cut out to make a particular solid.
This drawing of an unfolded shape is called a net of the solid.

Let us look at the net for a cube.

(i) Cube (ii) Net of a cube
Fig. 5.24

We see that the net of a cube consists of 6 squares of equal size. We draw 6
squares because a cube has 6 faces. The side of the square will be an edge of
the cube.

But just any arrangement of 6 square will not work as a net for a cube. For
example, in Fig. 5.25, the figure shown does not represent, a net for a cube.
A few more nets are given below. Not a net for a cube
Fig. 5.25
Shape Net

(i) Cuboid

(ii) Cone

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