Identifying lines of symmetry in 2D shapes

In this lesson, we will explore the meaning of lines of symmetry and addresses common misconceptions.

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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 is the name given to a triangle with 3 equal sides?

Right angled triangleTrapeziumScalene triangleEquilateral triangle

1/5

Q2.What is the name given to a triangle which has the following three angles: 80°, 40° and 60° ?

Equilateral triangleRight angled triangleScalene triangleIsosceles triangle

2/5

Q3.If a triangle has the angles of 90° and 60°, what is the third angle?

30°90°180°40°

3/5

Q4.Which of these are NOT interior angles of a triangle?

70° , 70° and 40°60°, 60° and 60°80°, 20°, 70°40°, 55°, 75°

4/5

Q5.A right angled triangle can also be ...

an equilateral trianglea scalene or isosceles trianglea scalene or an equilateral trianglean isosceles or an equilateral triangle

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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 name given to a triangle with 3 equal sides?

Right angled triangleTrapeziumScalene triangleEquilateral triangle

1/5

Q2.What is the name given to a triangle which has the following three angles: 80°, 40° and 60° ?

Equilateral triangleRight angled triangleScalene triangleIsosceles triangle

2/5

Q3.If a triangle has the angles of 90° and 60°, what is the third angle?

30°90°180°40°

3/5

Q4.Which of these are NOT interior angles of a triangle?

70° , 70° and 40°60°, 60° and 60°80°, 20°, 70°40°, 55°, 75°

4/5

Q5.A right angled triangle can also be ...

an equilateral trianglea scalene or isosceles trianglea scalene or an equilateral trianglean isosceles or an equilateral triangle

5/5

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >

Quiz:

Identifying lines of symmetry in 2D shapes

Questions that test your knowledge on lines of symmetry

Q1.Which statement best describes a line of symmetry?

A curved lineA long lineA straight line that passes through the centre of the shape so that one side of the line is exactly the same as the other sideA straight line that passes through the centre of the shape so that one part is different to the other part

1/5

Q2.How many lines of symmetry does a square have?

0124

2/5

Q3.Which of the following statements is correct?

Only regular shapes have lines of symmetryAll regular shapes have exactly 2 lines of symmetrySome 2d shapes have lines of symmetry and some do not have anyOnly 3d shapes have lines of symmetry

3/5

Q4.Which of the following statements is incorrect?

A square has 4 lines of symmetryAn isosceles triangle has 2 lines of symmetryIrregular shapes can have lines of symmetryAn equilateral triangle has 3 lines of symmetry

4/5

Q5.Which os the statements about triangles is correct?

An equilateral triangle has exactly 2 lines of symmetryAn isosceles triangle has 0 lines of symmetryA scalene triangle has 0 lines of symmetryA scalene triangle has 2 lines of symmetry

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >

Quiz:

Identifying lines of symmetry in 2D shapes

Questions that test your knowledge on lines of symmetry

Q1.Which statement best describes a line of symmetry?

1/5

Q2.How many lines of symmetry does a square have?

0124

2/5

Q3.Which of the following statements is correct?

Only regular shapes have lines of symmetryAll regular shapes have exactly 2 lines of symmetrySome 2d shapes have lines of symmetry and some do not have anyOnly 3d shapes have lines of symmetry

3/5

Q4.Which of the following statements is incorrect?

A square has 4 lines of symmetryAn isosceles triangle has 2 lines of symmetryIrregular shapes can have lines of symmetryAn equilateral triangle has 3 lines of symmetry

4/5

Q5.Which os the statements about triangles is correct?

An equilateral triangle has exactly 2 lines of symmetryAn isosceles triangle has 0 lines of symmetryA scalene triangle has 0 lines of symmetryA scalene triangle has 2 lines of symmetry

5/5

Lesson summary: Identifying lines of symmetry in 2D shapes

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This was the final lesson in the unit 2-D shape, perimeter and area.

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