Internal angles in a quadrilateral

In this lesson, we will be able to use triangles to deduce the sum of the interior angles in a quadrilateral. We will also be able to find unknown angles in quadrilaterals.

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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.Decide if the following statement is always, sometimes or never true: The diagonals of a quadrilateral intersect.

1/6

Q2.Decide if the following statement is always, sometimes or never true: The diagonals of a rhombus are perpendicular.

2/6

Q3.Decide if the following statement is always, sometimes or never true: The diagonals of a trapezium are perpendicular.

3/6

Q4.Decide if the following statement is always, sometimes or never true: The diagonals of a quadrilateral are the same length

4/6

Q5.Which line (A, B or C) is a diagonal of this shape?

5/6

Q6.The diagonals of a three quadrilaterals are shown, draw and name the shapes.

6/6

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.Decide if the following statement is always, sometimes or never true: The diagonals of a quadrilateral intersect.

1/6

Q2.Decide if the following statement is always, sometimes or never true: The diagonals of a rhombus are perpendicular.

2/6

Q3.Decide if the following statement is always, sometimes or never true: The diagonals of a trapezium are perpendicular.

3/6

Q4.Decide if the following statement is always, sometimes or never true: The diagonals of a quadrilateral are the same length

4/6

Q5.Which line (A, B or C) is a diagonal of this shape?

5/6

Q6.The diagonals of a three quadrilaterals are shown, draw and name the shapes.

6/6

Video

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Worksheet

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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:

Internal angles in quadrilaterals Quiz

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

Q1.Find the size of the missing angle.

1/6

Q2.Calculate the missing angle, labelled x

2/6

Q3.Find the missing angles, x, y and z

3/6

Q4.Find the size of the missing angles.

4/6

Q5.Shown below is a rhombus. Calculate each of the missing angles

5/6

Q6.Find the size of the missing angle.

6/6

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:

Internal angles in quadrilaterals Quiz

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

Q1.Find the size of the missing angle.

1/6

Q2.Calculate the missing angle, labelled x

2/6

Q3.Find the missing angles, x, y and z

3/6

Q4.Find the size of the missing angles.

4/6

Q5.Shown below is a rhombus. Calculate each of the missing angles

5/6

Q6.Find the size of the missing angle.

6/6

Lesson summary: Internal angles in a quadrilateral

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