Year 3 - Maths
Join four right angles at a point using different right-angled polygons
Right angles
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Study Guides
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 rotate 2 lines around a fixed point to make different angles. They identify vertices and describe half, quarter and three-quarter turns in terms of right angles.
Lesson Summary
You will learn to recognise right angles and describe what happens when they are joined at a point.
Key Notes
- Where four right angles meet, there is a full turn and no gaps between the shapes.
- Joining four right angles at a point will always make a full turn.
- A right angle is marked with a small square corner inside the angle.
Vocabulary To Learn
- At a point: A point is an exact location. It has no size, only position.
Common Mistakes To Avoid
- Pupils may not correctly identify right angles within a shape to join them.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Where four right angles meet, there is a full turn and no gaps between the shapes. Joining four right angles at a point will always make a full turn.
2. Use this key word in a maths sentence and explain it clearly. 'At a point'
A point is an exact location. It has no size, only position. 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 not correctly identify right angles within a shape to join them. Correction: Make sure that pupils have opportunities to identify right angles within a range of shapes prior to the lesson. If possible, encourage them to mark the right angles to help them. They should only be joining these right angles around a point.
More Lessons In This Unit
- Identify and describe right angles Study Guide
- Identify properties of quadrilaterals Study Guide
- Identify properties of triangles Study Guide
- Investigate and draw other polygons with right angles Study Guide
- Investigate the shapes made when rectangles are cut on the diagonal Study Guide
- Know that a rectangle is a four-sided polygon with four right angles Study Guide
- Know that a right angle describes a quarter turn Study Guide
- Know that a square is a rectangle in which the four sides are of equal length Study Guide
- Make different sized angles by rotating two lines around a fixed point Study Guide
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