Year 5 - Maths
Draw angles accurately using a protractor
Angles: compare, name, estimate and measure angles
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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 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 draw angles accurately using a protractor.
Key Notes
- A protractor can be used to draw angles.
- Protractors have two scales from 0 to 180 degrees.
- Start from zero when reading the scale on a protractor.
- Line the protractor up with one of the lines forming the angle.
Vocabulary To Learn
- Protractor: A protractor is an instrument used to measure angles.
- Angle: An angle is a measure of turn.
- Polygon: A polygon is a 2D shape made up of three or more straight lines.
Common Mistakes To Avoid
- Pupils draw a straight line to begin to create their angle and then place the centre of the protractor in the middle of the straight line.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
A protractor can be used to draw angles. Protractors have two scales from 0 to 180 degrees.
2. Use this key word in a maths sentence and explain it clearly. 'Protractor'
A protractor is an instrument used to measure angles. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils draw a straight line to begin to create their angle and then place the centre of the protractor in the middle of the straight line. Correction: Encourage pupils to place the middle spot of the protractor on one end of the straight line as this will make it easier to mark on the second line to create the vertex once the protractor has been removed.
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
- 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 and identification of right angles 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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