# Decimals and measures: Calculating the area of parallelograms and triangles

In this lesson, we will use and investigate formulae to calculate the area of a triangle and parallelogram.

#### 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!

Q1.0.56 x 10

1/6

Q2.1.405 x 100

2/6

Q3.4.56 ÷ 100

3/6

Q4.654.8 ÷ 10

4/6

Q5.What is the area of the shape below?

5/6

Q6.What is the perimeter of the shape below?

6/6

#### 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!

Q1.0.56 x 10

1/6

Q2.1.405 x 100

2/6

Q3.4.56 ÷ 100

3/6

Q4.654.8 ÷ 10

4/6

Q5.What is the area of the shape below?

5/6

Q6.What is the perimeter of the shape below?

6/6

# 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:

# Calculate the area of parallelograms and triangles

Calculate the area of parallelograms and triangles

Q1.Calculate the area of the parallelogram.

1/3

Q2.Calculate the area of the triangle.

2/3

Q3.A shape is made up of 12 congruent equilateral triangles, with base 3.4 cm and height 2.9 cm. What is the total area of the shape?

3/3

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

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

# Calculate the area of parallelograms and triangles

Calculate the area of parallelograms and triangles

Q1.Calculate the area of the parallelogram.

1/3

Q2.Calculate the area of the triangle.

2/3

Q3.A shape is made up of 12 congruent equilateral triangles, with base 3.4 cm and height 2.9 cm. What is the total area of the shape?

3/3

# Lesson summary: Decimals and measures: Calculating the area of parallelograms and triangles

## 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