# The case of 30 and 60 degrees

In this lesson, we will look at the special cases of 30 and 60 degrees right angled-triangles.

#### 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.What is the name of the longest side in a triangle?

1/5

Q2.Triangle Y has been enlarged. Work out the length of the base of triangle X.

2/5

Q3.What is the size of the marked angle?

3/5

Q4.What is the length of m?

4/5

Q5.What is the length of the missing side?

5/5

#### 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.What is the name of the longest side in a triangle?

1/5

Q2.Triangle Y has been enlarged. Work out the length of the base of triangle X.

2/5

Q3.What is the size of the marked angle?

3/5

Q4.What is the length of m?

4/5

Q5.What is the length of the missing side?

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.

#### Unit quizzes are being retired in August 2023

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

# The case of 30 and 60 degrees

Exit Quiz

Q1.a is half the size of the hypotenuse when 𝑥 = ?

1/6

Q2.b = 10 cm when 𝑥 = ?

2/6

Q3.What is the size of the angle marked x ?

3/6

Q4.What is the length of the hypotenuse?

4/6

Q5.What is the length of angle x?

5/6

Q6.What is the size of angle x?

6/6

#### Unit quizzes are being retired in August 2023

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

# The case of 30 and 60 degrees

Exit Quiz

Q1.a is half the size of the hypotenuse when 𝑥 = ?

1/6

Q2.b = 10 cm when 𝑥 = ?

2/6

Q3.What is the size of the angle marked x ?

3/6

Q4.What is the length of the hypotenuse?

4/6

Q5.What is the length of angle x?

5/6

Q6.What is the size of angle x?

6/6

# Lesson summary: The case of 30 and 60 degrees

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Walk

On the spot:
Dance