Find areas of similar shapes given corresponding lengths

For similar shapes, use the linear scale factor to calculate the area scale factor and find areas of similar shapes.

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.

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!

Question 1

Question 2

Question 3

Q1.Shape A maps to shape B in an enlargement, calculate the scale factor.

1/3

Q2.Why have corresponding vertices been joined up in shapes A and B with straight lines in this enlargement?

2/3

Q3.The point at (-2,-1) is enlarged by a scale factor of -2 from the centre of enlargement at (0,0). What will the new coordinate of the point be?

3/3

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.

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!

Question 1

Question 2

Question 3

Q1.Shape A maps to shape B in an enlargement, calculate the scale factor.

1/3

Q2.Why have corresponding vertices been joined up in shapes A and B with straight lines in this enlargement?

2/3

Q3.The point at (-2,-1) is enlarged by a scale factor of -2 from the centre of enlargement at (0,0). What will the new coordinate of the point be?

3/3

Video

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Worksheet

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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.

Quiz:

Find areas of similar shapes given corresponding lengths

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

Question 1

Question 2

Question 3

Question 4

Q1.Shape A and shape B are similar. Calculate the area of shape B.

1/4

Q2.Two similar triangles have heights of 2 cm and 10 cm. The area of the smaller triangle is 5 cm². Calculate the area of the larger triangle.

2/4

Q3.Complete the missing word:

3/4

Q4.Triangle A and triangle B are similar. Calculate the base length of triangle B.

4/4

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.

Quiz:

Find areas of similar shapes given corresponding lengths

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

Question 1

Question 2

Question 3

Question 4

Q1.Shape A and shape B are similar. Calculate the area of shape B.

1/4

Q2.Two similar triangles have heights of 2 cm and 10 cm. The area of the smaller triangle is 5 cm². Calculate the area of the larger triangle.

2/4

Q3.Complete the missing word:

3/4

Q4.Triangle A and triangle B are similar. Calculate the base length of triangle B.

4/4

Lesson summary: Find areas of similar shapes given corresponding lengths

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