# Revisiting area: Working out side lengths when given area

In this lesson, we will be looking at working out side lengths of various quadrilaterals and triangles when only given the area and 1 other measure of a shape.

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

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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 the following is larger than the area of a circle with a radius of 3cm?

1/5

Q2.Which of the following is larger than the area of a circle with a radius of 2cm?

2/5

Q3.Which of the following is smaller than the area of a circle with a radius of 4cm?

3/5

Q4.True or false: A circle with a radius of 1cm has a larger area than a rectangle with a base of 1cm and a height of 3cm.

4/5

Q5.True or false: A circle with a radius of 2cm has a larger area than a rectangle with a base of 2cm and a height of 6cm.

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 the following is larger than the area of a circle with a radius of 3cm?

1/5

Q2.Which of the following is larger than the area of a circle with a radius of 2cm?

2/5

Q3.Which of the following is smaller than the area of a circle with a radius of 4cm?

3/5

Q4.True or false: A circle with a radius of 1cm has a larger area than a rectangle with a base of 1cm and a height of 3cm.

4/5

Q5.True or false: A circle with a radius of 2cm has a larger area than a rectangle with a base of 2cm and a height of 6cm.

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

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:

# Revisiting Area - Working Out Side Lengths Quiz

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

Q1.What is the height of a triangle with an area of 24 and a base of 8?

1/5

Q2.What is the base of a parallelogram with an area of 24 and a height of 3?

2/5

Q3.What is the height of a triangle with an area of 55 and a base of 11?

3/5

Q4.This trapezium has an area of 25. Given that a=6 and b=4. Work out the height of the trapezium.

4/5

Q5.This trapezium has an area of 30. Given that a=7 and h = 4. Work out the length of b.

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:

# Revisiting Area - Working Out Side Lengths Quiz

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

Q1.What is the height of a triangle with an area of 24 and a base of 8?

1/5

Q2.What is the base of a parallelogram with an area of 24 and a height of 3?

2/5

Q3.What is the height of a triangle with an area of 55 and a base of 11?

3/5

Q4.This trapezium has an area of 25. Given that a=6 and b=4. Work out the height of the trapezium.

4/5

Q5.This trapezium has an area of 30. Given that a=7 and h = 4. Work out the length of b.

5/5

# Lesson summary: Revisiting area: Working out side lengths when given area

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## Time to move!

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For 5 mins...

Move around:
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On the spot:
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