# Find the value of missing angles in quadrilaterals

In this lesson, we will represent the angles in a quadrilateral pictorially and algebraically before learning how to calculate missing angles.

#### 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 value of angle a?

1/3

Q2.What is the value of angle a?

2/3

Q3.What is the value of angle y?

3/3

#### 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 value of angle a?

1/3

Q2.What is the value of angle a?

2/3

Q3.What is the value of angle y?

3/3

# 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:

# Missing angles and lengths - Whole unit quiz

Testing your learning from the whole unit.

Q1.Estimate the size of the angle.

1/5

Q2.Find the size of angle a.

2/5

Q3.Find the size of angle c.

3/5

Q4.Find the size of angle c.

4/5

Q5.Find the size of angle w.

5/5

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

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

# Missing angles and lengths - Whole unit quiz

Testing your learning from the whole unit.

Q1.Estimate the size of the angle.

1/5

Q2.Find the size of angle a.

2/5

Q3.Find the size of angle c.

3/5

Q4.Find the size of angle c.

4/5

Q5.Find the size of angle w.

5/5

# Lesson summary: Find the value of missing angles in quadrilaterals

## Time to move!

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

For 5 mins...

Move around:
Jog

On the spot:
Dance