Year 3 - Maths
Identify and describe right angles
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 identify a square corner as a right angle and can find and identify right angles in the environment.
Key Notes
- A right angle is a square corner.
- A right angle is a quarter turn.
- There are right angles in buildings and the environment.
Vocabulary To Learn
- Right angle: A quarter of a full turn, a 'square corner'.
Common Mistakes To Avoid
- Pupils may think there is only ever one right angle in an object or shape.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
A right angle is a square corner. A right angle is a quarter turn.
2. Use this key word in a maths sentence and explain it clearly. 'Right angle'
A quarter of a full turn, a 'square corner'. 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 think there is only ever one right angle in an object or shape. Correction: Provide opportunities for pupils to explore objects and shapes that have more than one right angle and show that these are not always rectangular e.g. some trapeziums can have more than one right angle.
More Lessons In This Unit
- 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
- Join four right angles at a point using different right-angled polygons 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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