All: Be able to identify properties of 3D shapes (5b)

Most: Be able to draw accurate nets for cuboids (5a)

Some: Be able to draw accurate nets of other 3D shapes (6c)

In pairs...

Can you write a mathematical definition of each of the following words:

o Faceso Vertex/verticeso Edges

Can you write a mathematical definition of each of the following words:

o Faces – the individual surfaces of a 3D shapeo Vertex/vertices – corners o Edges – an edge joins one vertex with another

NetsWhat is the net of a shape?

A net is a pattern that you can cut and fold

to make a model of a 3D

shape. If I cut the shape out and folded it along the lines, what 3D shape would I make?

What 3-D shape would these nets make?

A B

C D

Drawing nets

6cm

2cm

3cm

First draw the base. This is 2 cm by 6cm.

Next draw the side of the shape. The sides are 3cm by 6cm.

You then need to draw the two ends of the cuboid. These are 2cm by 3cm

DON’T FORGET THE TOP! The top is the same as the bottom – 2cm by 6cm

Drawing nets

3cm2cm

7cm

9cm1cm

2cm

6cm4cm

5cm

•Draw the base•Draw in the sides•Draw the two end faces•Don’t forget the top!Q1

Q2

Q3

3cm2cm

7cm

Q1

9cm1cm

2cm Q2

6cm4cm

5cm

Q3

Plenary

1) Name one everyday item that is the shape of each of the following:

Sphere Triangular prism Cylinder

2) Can you use the net for question one to work out the surface area of the cuboid? Surface area: the total of the area of all the faces