Year 3 - Maths
Draw shapes with given properties
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 draw quadrilaterals and other polygons with given properties.
Key Notes
- If you know the properties of a shape you can use a ruler and a grid to create it.
- Lines are perpendicular when they are at right angles to each other.
- Lines are parallel because they are always the same distance apart.
Vocabulary To Learn
- Quadrilateral: A quadrilateral is a polygon with four straight sides and four vertices.
- Vertex / vertices: A vertex is the point where two lines meet. The plural is vertices.
Common Mistakes To Avoid
- Children overgeneralise about the appearance of polygons such as rectangles and pentagons and do not recognise them when they are less typical.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
If you know the properties of a shape you can use a ruler and a grid to create it. Lines are perpendicular when they are at right angles to each other.
2. Use this key word in a maths sentence and explain it clearly. 'Quadrilateral'
A quadrilateral is a polygon with four straight sides and four vertices. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Children overgeneralise about the appearance of polygons such as rectangles and pentagons and do not recognise them when they are less typical. Correction: Ensure modelling and examples show a range of shapes. For example, show a range of rectangles and focus on the key properties of parallel and perpendicular sides to identify that they are all rectangles.
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 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 shapes with and without parallel and perpendicular sides 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.