A net is a 2D representation of the faces of a 3D shape, that can be folded up into the 3D object.

The same 3D shapes can be composed from different 2D nets

Maths

Use knowledge of shape properties to sketch and identify shapes

Use knowledge of shape properties to draw shapes accurately using rulers and protractors

3D shapes can be composed from 2D nets

When a 2D shape is decomposed and the parts rearranged, the areas remains the same

Any parallelogram can be decomposed and the parts rearranged to form a rectangular parallelogram

Two congruent triangles can be arranged to compose a parallelogram

Shapes with the same areas can have different perimeters and vice versa

Reason about shapes using the relationship between side lengths and area and perimeter

Reason about compound shapes using the relationship between side lengths and area and perimeter

In this unit pupils will use knowledge of shape properties to draw, sketch and identify shapes  In the future unit pupils will explain how to calculate the area of a parallelogram and a triangle and describe the relationship between scale factors and side lengths of two shapesThey will describe positions in all four quadrants drawing and translating simple shapes and reflecting them in the axes

In the prior unit pupils compared the size of angles with a clear visual difference and use the terms acute obtuse and reflex when describing the size of angles or amount of rotation with relation to right angles using a unit called degrees In this unit pupils will use knowledge of shape properties to draw, sketch and identify shapes

In this unit pupils will use knowledge of shape properties to draw, sketch and identify shapes.

Draw, compose and decompose shapes

It is possible for a 3D shape to have more than one net.

Net a would form a triangular prism but net b would not.

Net b would form a triangular prism but net a would not.

Which of these are nets for a triangular prism?

Look carefully at the net of the cube. Match the letters so that opposite faces of the cube are together.

This is a net for a dice. Which face would have 2 spots?

Match the shape to the correct number of sides.

Which of these could be the net of a cube?

Which 2D shapes would be required to form the net of a cylinder?

This is a pentagonal prism. It would need two pentagons in its net. How many rectangles would it need?

Nothing. It is already the net of a triangular prism.

What needs to happen to this net to make it the net of a triangular prism?

The same 3D shapes can be composed from different 2D nets

Lesson outcome