Year 6 - Maths
3D shapes can be composed from 2D nets
Draw, compose and decompose shapes
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will use knowledge of shape properties to draw, sketch and identify shapes.
Lesson Summary
You will learn to compose 3D shapes from 2D nets and identify the 2D net which will create a 3D shape.
Key Notes
- A net is a 2D shape that can be folded and joined to create a 3D shape.
- Not all arrangements of shapes will form the net of a 3D shape.
Vocabulary To Learn
- net: A net is a 2D representation of the faces of a 3D shape, that can be folded up into the 3D object.
Common Mistakes To Avoid
- It is perfectly possible for pupils to be highly numerate but struggle with the spatial awareness needed to visualise / imagine whether a 2D net will fold together to form a 2D shape.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
A net is a 2D shape that can be folded and joined to create a 3D shape. Not all arrangements of shapes will form the net of a 3D shape.
2. Use this key word in a maths sentence and explain it clearly. 'net'
A net is a 2D representation of the faces of a 3D shape, that can be folded up into the 3D object. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: It is perfectly possible for pupils to be highly numerate but struggle with the spatial awareness needed to visualise / imagine whether a 2D net will fold together to form a 2D shape. Correction: As part of the lesson design process you may wish to incorporate manipulatives such as construction materials for those pupils whose learning needs scaffolding. As with all scaffolding, aim to move pupils away from this when you can.
More Lessons In This Unit
- Any parallelogram can be decomposed and the parts rearranged to form a rectangular parallelogram Study Guide
- Reason about compound shapes using the relationship between side lengths and area and perimeter Study Guide
- Reason about shapes using the relationship between side lengths and area and perimeter Study Guide
- Shapes with the same areas can have different perimeters and vice versa Study Guide
- The same 3D shapes can be composed from different 2D nets Study Guide
- Two congruent triangles can be arranged to compose a parallelogram Study Guide
- Use knowledge of shape properties to draw shapes accurately using rulers and protractors Study Guide
- Use knowledge of shape properties to sketch and identify shapes Study Guide
- When a 2D shape is decomposed and the parts rearranged, the areas remains the same Study Guide
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