Interior & Exterior Angles Explained

This video explains interior and exterior angles of a polygon. In particular: how to calculate interior and exterior angle, how to find the the sum of interior or exterior angles, and how to find the number of sides of a polygon with just an angle.
Practice questions are provided at the end of the video and more can be found on our 'Interior and Exterior Angles: Test Your Knowledge' video: • Interior & Exterior An...
This is an updated, 4K version of our previous video.
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00:00 Introduction
00:32 What is an interior angle and what is an exterior angle?
00:52 How to find the sum of interior angles
02:09 Formula for sum of interior angles
03:00 How to find an interior angle (for regular polygons)
03:22 Sum of exterior angles
03:32 Finding an exterior angle with a given interior angle
03:53 Finding the number of sides of a polygon (for regular polygons)
04:11 Practice questions
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