# Calculating angles within a shape 3

In this lesson, we will learn about parallel lines, their angles and how we can use this information within composite shapes.

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

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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 type of quadrilateral has 4 equal sides and 4 equal angles?

1/5

Q2.What type of quadrilateral has 4 equal sides and 2 pairs of parallel sides?

2/5

Q3.What type of quadrilateral has 2 pairs of equal angles and 2 pairs of equal parallel sides?

3/5

4/5

Q5.What is the size of the missing angle in this quadrilateral with angles: 90°, 120°, 40°, ?

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 type of quadrilateral has 4 equal sides and 4 equal angles?

1/5

Q2.What type of quadrilateral has 4 equal sides and 2 pairs of parallel sides?

2/5

Q3.What type of quadrilateral has 2 pairs of equal angles and 2 pairs of equal parallel sides?

3/5

4/5

Q5.What is the size of the missing angle in this quadrilateral with angles: 90°, 120°, 40°, ?

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:

# Calculating angles within a shape 3: parallel lines

parallel lines

Q1.How many parallel lines are in a trapezium

1/3

Q2.Is this statement true always, sometimes or never? "A parallelogram has right angles"

2/3

Q3.In this parallelogram (30°, 150°,30°,?°) is this missing angle acute, obtuse reflex or a right angle?

3/3

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

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

# Calculating angles within a shape 3: parallel lines

parallel lines

Q1.How many parallel lines are in a trapezium

1/3

Q2.Is this statement true always, sometimes or never? "A parallelogram has right angles"

2/3

Q3.In this parallelogram (30°, 150°,30°,?°) is this missing angle acute, obtuse reflex or a right angle?

3/3

# Lesson summary: Calculating angles within a shape 3

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga