Year 5 - Maths
Review understanding and identification of right angles
Angles: compare, name, estimate and measure 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 compare the size of angles where there is a clear visual difference and use the terms acute, obtuse and reflex when describing the size of angles or amount of rotation with relation to right angles using a unit called degrees.
Lesson Summary
You will learn to recall understanding and identification of right angles.
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 right angle is a quarter of a full turn. It can be known as a 'square corner'.
Common Mistakes To Avoid
- Right angles are only where a horizontal and vertical line meet to create a square corner.
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 right angle is a quarter of a full turn. It can be known as 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: Right angles are only where a horizontal and vertical line meet to create a square corner. Correction: Ensure pupils are shown a wide range of right angles in a variety of orientations and contexts so that pupils can better generalise the features of a right angle.
More Lessons In This Unit
- Angles in quadrilaterals Study Guide
- Angles in triangles Study Guide
- Describe rotations using the standard unit of degrees when compared to a right angle Study Guide
- Describe static angles using the standard unit of degrees when compared to a right angle Study Guide
- Draw angles accurately using a protractor Study Guide
- Estimate acute and obtuse angles using the standard unit of degrees Study Guide
- Know that the angles at a point sum to 360 degrees and use this to solve problems Study Guide
- Know that the angles in a full turn sum to 360 degrees and use this to solve problems Study Guide
- Know that the angles on a straight line sum to 180 degrees and use this to solve problems Study Guide
- Measure the size of angles accurately using a protractor Study Guide
- Reasoning about angles in polygons Study Guide
- Review understanding of angles as a measure of turn Study Guide
- Use the terms acute, obtuse and reflex when comparing angles to a right angle Study Guide
- Use the unit of degrees as a standard unit to measure angles Study Guide
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