Year 1 - Maths
Identify 2D shapes within 3D shapes
Recognise, compose, decompose and manipulate 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 compose, copy, extend and develop repeating and radiating patterns. They will explore, discuss and compare 3D and 2D shapes.
Lesson Summary
You will learn to describe the individual faces on 3D shapes.
Key Notes
- Recognise and know the difference between flat faces and curved surfaces.
- Know that when a shape is lying on a curved surface it will roll.
- Know that when a shape is lying on a flat face it will slide.
- Know that 3D shapes can have different shaped faces. For example, cones and cylinders have some circular faces.
Vocabulary To Learn
- Curved surface: A rounded surface that is not flat.
- Face: Any of the flat surfaces of an object.
- Square face: The flat surface of a 3D shape that is shaped like a square with four sides that are equal in length.
- Rectangular face: The flat surface of a 3D shape that is shaped like a rectangle with four sides.
- Circular face: The flat surface of a 3D shape that is shaped like a circle with one curved line.
Common Mistakes To Avoid
- May think that a sphere has a circular face because when drawn, a sphere looks like a circle.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Recognise and know the difference between flat faces and curved surfaces. Know that when a shape is lying on a curved surface it will roll.
2. Use this key word in a maths sentence and explain it clearly. 'Curved surface'
A rounded surface that is not flat. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: May think that a sphere has a circular face because when drawn, a sphere looks like a circle. Correction: Physically handle and compare spheres, cylinders and cones. Explore why a sphere cannot stand but a cylinder and a cone can.
More Lessons In This Unit
- Compose tangram images Study Guide
- Composing pattern block images Study Guide
- Copy, extend and describe repeating patterns Study Guide
- Examine ways that cubes can be composed into different arrangements Study Guide
- Explore and recognise 2D shapes Study Guide
- Explore, discuss and compare 2D shapes Study Guide
- Explore, discuss and identify shapes that are and are not circles Study Guide
- Explore, discuss and identify shapes that are and are not rectangles Study Guide
- Explore, discuss and identify shapes that are and are not triangles Study Guide
- Explore, recognise and compare three different 3D shapes Study Guide
- Explore, recognise and compare three more 3D shapes Study Guide
- Radiating patterns Study Guide
- Recognise, describe and sort 3D shapes Study Guide
- Tetrominoes and pentominoes Study Guide
Browse all guides in the Year 1 Maths guide library.