Year 3 - Maths
Make and draw shapes with and without parallel and perpendicular sides
Parallel and perpendicular sides in polygons
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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 investigate ways to compose and decompose polygons. They will investigate quadrilaterals with and without parallel and perpendicular sides.
Lesson Summary
You will learn to make and draw compound shapes with and without parallel and perpendicular sides.
Key Notes
- The properties must match the shape you have created.
- Lines are not perpendicular when they are not at right angles to each other.
- Lines are not parallel because they are not always the same distance apart.
Vocabulary To Learn
- Compound: A compound shape is one created using two or more basic shapes.
- Vertex / vertices: A vertex is the point where two lines meet. The plural is vertices.
Common Mistakes To Avoid
- Pupils may find it challenging to recognise that the properties of composed shapes may be different from the shapes they are composed of.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
The properties must match the shape you have created. Lines are not perpendicular when they are not at right angles to each other.
2. Use this key word in a maths sentence and explain it clearly. 'Compound'
A compound shape is one created using two or more basic shapes. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may find it challenging to recognise that the properties of composed shapes may be different from the shapes they are composed of. Correction: Drawing around compound shapes can really support children thinking about this as a 'new' shape with new properties.
More Lessons In This Unit
- Construct quadrilaterals with and without parallel and perpendicular sides Study Guide
- Draw polygons on isometric paper Study Guide
- Draw shapes with given properties Study Guide
- Draw shapes with given properties on a range of geometric grids Study Guide
- Identifying parallel lines Study Guide
- Investigate different ways of decomposing a polygon Study Guide
- Make and draw quadrilaterals on circular geoboards Study Guide
- Make and draw triangles on circular geoboards Study Guide
- Make shapes by joining two polygons in different ways Study Guide
Browse all guides in the Year 3 Maths guide library.