# Finding unknown angles

In this lesson, we will learn how to use the term 'vertically opposite' and solve more angle problems.

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.If Angle A is greater than Angle B, how can I express this mathematically?

1/5

Q2.If Angle Y = Angle X = Angle Z, which of the following is true?

2/5

Q3.If g > h, then which of the following results in the greater value?

3/5

Q4.You are given that: 360 - R = S. Which of the following statements is correct?

4/5

Q5.If I have 5 equal angles around a point, what do each of the angles individually equal?

5/5

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.If Angle A is greater than Angle B, how can I express this mathematically?

1/5

Q2.If Angle Y = Angle X = Angle Z, which of the following is true?

2/5

Q3.If g > h, then which of the following results in the greater value?

3/5

Q4.You are given that: 360 - R = S. Which of the following statements is correct?

4/5

Q5.If I have 5 equal angles around a point, what do each of the angles individually equal?

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.

Quiz:

# Finding unknown angles

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

Q1.A circle split into 4 equal parts would result in the equal angles around the centre point being...

1/5

Q2.If a regular octagon was split into 8 equal parts, each equal angle at the centre would be...

2/5

Q3.You are given that: a + a + a + a = 180. What is the value of a?

3/5

Q4.If I have an equilateral triangle and a square around a point, what is the remaining angle left?

4/5

Q5.If each of the angles on a straight line are 50, 60, x and y, what is x?

5/5

Quiz:

# Finding unknown angles

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

Q1.A circle split into 4 equal parts would result in the equal angles around the centre point being...

1/5

Q2.If a regular octagon was split into 8 equal parts, each equal angle at the centre would be...

2/5

Q3.You are given that: a + a + a + a = 180. What is the value of a?

3/5

Q4.If I have an equilateral triangle and a square around a point, what is the remaining angle left?

4/5

Q5.If each of the angles on a straight line are 50, 60, x and y, what is x?

5/5

# Lesson summary: Finding unknown angles

## 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