Maths

Exit Lesson

Compare and order acute, obtuse and reflex angles

In this lesson, we will learn about reflex angles, and then consider how to compare and order acute, obtuse and reflex angles.

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Unit quizzes are being retired in August 2023

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Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which of these angles is obtuse?

1/5

Q2.Which is the smallest angle?

2/5

Q3.Is this statement always, sometimes or never true: "I can draw a triangle with 2 obtuse angles"

3/5

Q4.How many acute, obtuse and right angles are there in this shape?

4/5

Q5.Is this statement always, sometimes or never true: "A quadrilateral has 4 acute angles"

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Which of these angles is obtuse?

1/5

Q2.Which is the smallest angle?

2/5

Q3.Is this statement always, sometimes or never true: "I can draw a triangle with 2 obtuse angles"

3/5

Q4.How many acute, obtuse and right angles are there in this shape?

4/5

Q5.Is this statement always, sometimes or never true: "A quadrilateral has 4 acute angles"

5/5

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

Recognising Decimal Tenths

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.A numberline starting at 0 and ending at 10 is divided into 10 equal parts. Each equal part represents:

1/5

Q2.A numberline starting at 0 and ending at 100 is divided into 10 equal parts. Each equal part represents:

2/5

Q3.A numberline starting at 0 and ending at 1 is divided into 10 equal parts. Each equal part represents:

3/5

Q4.A container is filled with four colours of sand. 0.3 of the container is blue, 0.1 is black. Which decimals could represent the yellow and white sand?

4/5

Q5.0.7 of a container is filled with water. How much of the container can still be filled?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

Recognising Decimal Tenths

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.A numberline starting at 0 and ending at 10 is divided into 10 equal parts. Each equal part represents:

1/5

Q2.A numberline starting at 0 and ending at 100 is divided into 10 equal parts. Each equal part represents:

2/5

Q3.A numberline starting at 0 and ending at 1 is divided into 10 equal parts. Each equal part represents:

3/5

Q4.A container is filled with four colours of sand. 0.3 of the container is blue, 0.1 is black. Which decimals could represent the yellow and white sand?

4/5

Q5.0.7 of a container is filled with water. How much of the container can still be filled?

5/5

Lesson summary: Compare and order acute, obtuse and reflex angles

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The next lesson in:
Angles
is:
Reading angles on a protractor (Part 1)

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