Maths

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Exterior angles

In this lesson, we will learn about exterior angles, and how they sum to 360 degrees.

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.

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.A triangle is made up of the following: 73 degrees, 51 degrees and x degrees. Solve for x.

1/5

Q2.If a quadrilateral contains 3 right angles, what must the final angle be to form a quadrilateral?

2/5

Q3.If the angles in a decagon are the following: 73 degrees, 293 degrees, 203 degrees, 9 degrees, 29 degrees, 184 degrees, 173 degrees, 93 degrees, 208 degrees, y degrees. Solve for y.

3/5

Q4.Is it possible to have two obtuse angles in a triangle?

4/5

Q5.You are told that V + W + X + Y + Z = total interior sum of a pentagon. If V = 90 degrees, W = 110 degrees, X = 10 degrees, Y = 300 degrees, what would Z be?

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.

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.A triangle is made up of the following: 73 degrees, 51 degrees and x degrees. Solve for x.

1/5

Q2.If a quadrilateral contains 3 right angles, what must the final angle be to form a quadrilateral?

2/5

Q3.If the angles in a decagon are the following: 73 degrees, 293 degrees, 203 degrees, 9 degrees, 29 degrees, 184 degrees, 173 degrees, 93 degrees, 208 degrees, y degrees. Solve for y.

3/5

Q4.Is it possible to have two obtuse angles in a triangle?

4/5

Q5.You are told that V + W + X + Y + Z = total interior sum of a pentagon. If V = 90 degrees, W = 110 degrees, X = 10 degrees, Y = 300 degrees, what would Z be?

5/5

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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.

Quiz:

Exterior angles

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

Q1.The total exterior angles of a polygon sum to...

1/5

Q2.Which of the following most closely matches the definition of an "exterior angle"?

2/5

Q3.If an interior angle is 103 degrees, then the exterior angle would be...

3/5

Q4.If an exterior angle is 15 degrees, then the interior angle would be...

4/5

Q5.If I wanted to find the exterior angle of a regular n-sided polygon, which formula should I follow?

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.

Quiz:

Exterior angles

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

Q1.The total exterior angles of a polygon sum to...

1/5

Q2.Which of the following most closely matches the definition of an "exterior angle"?

2/5

Q3.If an interior angle is 103 degrees, then the exterior angle would be...

3/5

Q4.If an exterior angle is 15 degrees, then the interior angle would be...

4/5

Q5.If I wanted to find the exterior angle of a regular n-sided polygon, which formula should I follow?

5/5

Lesson summary: Exterior angles

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The next lesson in:
Angles in polygons
is:
Regular interior and exterior angles (and mean of irregular)

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