# Find the number of sides when given the sum of interior angles

In this lesson, we will find the number of sides of a polygon when given only the sum of interior angles.

# 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:

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# 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.

# Lesson summary: Find the number of sides when given the sum of interior angles

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## 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