Year 2 - Maths
Find different ways to sort 3D shapes
Shape: discuss and compare 2D and 3D 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 learn that polygons can be described, sorted, compared and named according to the number of sides and vertices. They will describe 3D shapes, finding different ways to sort and compare them.
Lesson Summary
You will learn to find different ways to sort 3D shapes.
Key Notes
- 3D shapes can be sorted by their properties
- The properties of 3D shapes are the faces, edges and vertices
Vocabulary To Learn
- Faces: The flat 2D surfaces of a 3D shape.
- Edges: The straight lines where two faces of a 3D shape meet.
- Vertices: The corners of a shape where two or more edges meet.
Common Mistakes To Avoid
- Children may still find it difficult to count the number of faces, vertices and edges on a 3D shape when they are looking at an image of that shape.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
3D shapes can be sorted by their properties. The properties of 3D shapes are the faces, edges and vertices.
2. Use this key word in a maths sentence and explain it clearly. 'Faces'
The flat 2D surfaces of a 3D shape. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Children may still find it difficult to count the number of faces, vertices and edges on a 3D shape when they are looking at an image of that shape. Correction: Provide 3D shapes for the children to handle. Encourage them to mark the faces, vertices and edges with a wipe-clean pen as they count. Talk about where the properties can be found on each shape e.g. a triangular prism has 3 vertices at each end.
More Lessons In This Unit
- Describe and name 3D shapes Study Guide
- Describe and name 3d shapes – prisms and pyramids Study Guide
- Describe and name polygons, including triangles and quadrilaterals Study Guide
- Describe, name and sort polygons, including pentagons, hexagons and octagons Study Guide
- Discuss and compare 3D shapes Study Guide
- Discuss and compare polygons Study Guide
- Investigate how polygons can be joined and folded to form 3D shapes Study Guide
- Lines of symmetry Study Guide
- Recognise and sort polygons Study Guide
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