Drawing Similar Triangles

In this lesson, you will learn to draw triangles with the same interior angles using a protractor. And also discussing the properties of similar triangles.

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

Question 4

Question 5

Q1.When constructing a triangle, should you erase the construction lines at the end?

1/5

Q2.Which triangle is impossible to construct?

2/5

Q3.What equipment would you use to construct a 9cm, 7cm, 18cm triangle correctly?

3/5

Q4.Which triangle is impossible to construct?

4/5

Q5.How do I know from the construction that this is an impossible triangle?

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.

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

Question 4

Question 5

Q1.When constructing a triangle, should you erase the construction lines at the end?

1/5

Q2.Which triangle is impossible to construct?

2/5

Q3.What equipment would you use to construct a 9cm, 7cm, 18cm triangle correctly?

3/5

Q4.Which triangle is impossible to construct?

4/5

Q5.How do I know from the construction that this is an impossible triangle?

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.

Quiz:

Similar Triangles Quiz

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

Question 5

Q1.Complete the sentence: We can draw different triangles that have the same ______ angles using a ruler and a ________.

1/5

Q2.What is the length of the missing side, k, on the larger triangle?

2/5

Q3.Yasmin and Xiavier are talking about constructing triangles. Yasmin says you need 2 sides lengths to be able to construct a triangle. Xiavier says you need a protractor to construct a triangle. Who is correct?

3/5

Q4.What equipment would you use to construct 95°, 6cm, 55° triangle correctly?

4/5

Q5.Both angles have the same interior angles of ____, _____ and _______

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.

Quiz:

Similar Triangles Quiz

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

Question 5

Q1.Complete the sentence: We can draw different triangles that have the same ______ angles using a ruler and a ________.

1/5

Q2.What is the length of the missing side, k, on the larger triangle?

2/5

Q3.Yasmin and Xiavier are talking about constructing triangles. Yasmin says you need 2 sides lengths to be able to construct a triangle. Xiavier says you need a protractor to construct a triangle. Who is correct?

3/5

Q4.What equipment would you use to construct 95°, 6cm, 55° triangle correctly?

4/5

Q5.Both angles have the same interior angles of ____, _____ and _______

5/5

Lesson summary: Drawing Similar Triangles

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