# To Compare and Classify Isosceles and Scalene Triangles

In this lesson, we will revise the names of different types of triangles. We will look at what they have in common with each other and what makes them different. We will learn the properties of various types of triangles and use correct mathematical vocabulary to describe the features and properties of each. We will focus on scalene and isosceles triangles.

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.All triangles have how many sides?

1/5

Q2.Angles in a triangle add up to how many degrees?

2/5

Q3.All sides in an equilateral triangle are?

3/5

Q4.In a right angled triangle, the side opposite the right angle is always _____________.

4/5

Q5.Triangles can have 2 parallel sides?

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.All triangles have how many sides?

1/5

Q2.Angles in a triangle add up to how many degrees?

2/5

Q3.All sides in an equilateral triangle are?

3/5

Q4.In a right angled triangle, the side opposite the right angle is always _____________.

4/5

Q5.Triangles can have 2 parallel sides?

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:

# Plenary Quiz

What do you remember?

Q1.What kind of triangle has 3 identical sides?

1/6

Q2.Which type of triangle has no equal vertices?

2/6

Q3.What kind of triangle is this:

3/6

Q4.Which type of triangle has one angle that measures 90 degrees?

4/6

Q5.If one side of an equilateral triangle measures 9cm, what is it's perimeter?

5/6

Q6.Triangles have 3 equal length sides.

6/6

Quiz:

# Plenary Quiz

What do you remember?

Q1.What kind of triangle has 3 identical sides?

1/6

Q2.Which type of triangle has no equal vertices?

2/6

Q3.What kind of triangle is this:

3/6

Q4.Which type of triangle has one angle that measures 90 degrees?

4/6

Q5.If one side of an equilateral triangle measures 9cm, what is it's perimeter?

5/6

Q6.Triangles have 3 equal length sides.

6/6

# Lesson summary: To Compare and Classify Isosceles and Scalene Triangles

## Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance