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Year 10
Higher

Checking and securing understanding of angle notation and drawing/measuring angles

I can draw and measure any angle and am confident with various angle notations.

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Share activities with pupils
New
New
Year 10
Higher

Checking and securing understanding of angle notation and drawing/measuring angles

I can draw and measure any angle and am confident with various angle notations.

Download all resources
Share activities with pupils

Lesson details

Key learning points

  1. A protractor is used to draw angles.
  2. A protractor is used to measure the size of angles.
  3. A protractor measures angles in degrees.

Common misconception

Pupils read from the incorrect values on the protractor.

Encourage pupils to consider the type of angle they are measuring. If it is an acute angle, will it really measure 122°?

Keywords

  • Angle - An angle is a measure of turn. It is often displayed as the rotation between two line segments.

  • Reflex angle - An angle that is greater than a straight line (i.e. greater than 180°) is a reflex angle.

Pupils can assess each other's work during Task A. By having pupils work in pairs/small groups, they can all measure an angle and then compare their answers to check accuracy.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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Starter quiz

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6 Questions

Q1.
An is a measure of turn. It is often displayed as the rotation between two line segments.
Correct Answer: angle
Q2.
Which of these is an instrument used for measuring an angle?
measuring jug
pair of compasses
Correct answer: protractor
ruler
weighing scales
Q3.
Which of these units is used to measure angles?
centimetres
Correct answer: degrees
kilograms
litres
Q4.
An angle that is smaller than a right angle is called an angle.
Correct Answer: acute
Q5.
An angle that is greater than a right angle but smaller than a straight line is called an angle.
Correct Answer: obtuse
Q6.
An angle that is greater than a straight line (i.e. greater than 180°) is called a angle.
Correct Answer: reflex

Exit quiz

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6 Questions

Q1.
In which of these images is the protractor in a correct position to measure the marked angle?
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
Q2.
What is the size of the angle marked $$x$$?
An image in a quiz
Correct answer: 74°
86°
106°
114°
Q3.
What is the size of the angle marked $$x$$?
An image in a quiz
74°
86°
Correct answer: 106°
114°
Q4.
The size of the angle marked $$x$$ is °.
An image in a quiz
Correct Answer: 275, two hundred and seventy five
Q5.
Match each angle to its size.
An image in a quiz
Correct Answer:∠PQR,40°

40°

Correct Answer:∠QRP,90°

90°

Correct Answer:∠RPQ,50°

50°

Q6.
The three letter notation for the marked angle is ∠ .
An image in a quiz
Correct Answer: GMD, DMG