**Solid Shapes or 3-D Shapes**

Many objects that you see in your daily life such as
books, pencil box, football and gas cylinder are three-dimensional objects. All
these objects occupy some space and have three dimensions- length, breadth and
height.

**Example:**Cube, cuboid, cone, cylinder, sphere, etc. are examples of the solid shapes.

**Properties of 3-D Shapes**

3-d shapes have four properties that set them apart from
2-d shapes: faces, vertices, edges and volume. These properties not only allow
you to determine whether the shape is 2-d or 3-d but also which 3-d shape it
is.

**Faces, Edges and
Vertices of a Solid Shapes**

**Faces:**The surface of solid is called a face.

**Edges:**Edge of a solid is formed when two faces meet.

**Vertices:**The point where three faces meet is called the corner or vertex.

**Cube:**The cube has 6 identical plane faces, 8 vertices and 12 edges.

**Cuboid:**A cuboid has 6 rectangular plane faces, 8 vertices and 12 edges.

**Cone:**A cone has 1 plane and 1 curved faces, 1 edge and 1 vertex.

**Cylinder:**A cylinder has 2 plane and 1 curved faces, 2 edges and no vertex.

**Sphere:**A sphere has 1 curves face, no edge and no vertex.

**Nets of 3-D Shapes**

·
A net is a two-dimensional representation of a
three-dimensional figure that is unfolded along its edges so that each face the
figure is shown in two dimensions.

·
A net is a pattern made when the surface of a
three-dimensional figure is laid out felt showing each face of the figure. A
solid may have different nets.

The above is a net pattern for a box. Try to make the
box by suitable folding and glueing together. The box is a solid figure. It is
a three-dimensional shape names cuboid.

We have different nets for different solid shapes.

**Solved Example For You**

Question. Draw two different nets of a cube.

Solution: