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Interior and Exterior Angles of a Polygon
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Geometry: In this video we explain how to calculate interior and exterior angles of a polygon, 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.
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00:00 Introduction
00:14 What is an interior angle and what is an exterior angle?
00:23 How to find the sum of interior angles
01:26 Formula for sum of interior angles
02:06 How to find an interior angle (for regular polygons)
02:24 Sum of exterior angles
02:26 Finding an exterior angle with a given interior angle
02:54 Finding the number of sides of a polygon (for regular polygons)
03:06 Practice questions
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Skip to:
00:00 Introduction
00:14 What is an interior angle and what is an exterior angle?
00:23 How to find the sum of interior angles
01:26 Formula for sum of interior angles
02:06 How to find an interior angle (for regular polygons)
02:24 Sum of exterior angles
02:26 Finding an exterior angle with a given interior angle
02:54 Finding the number of sides of a polygon (for regular polygons)
03:06 Practice questions
We spend a lot of time and money making these videos, so here is a link to our Buy Me A Coffee page...feel free to contribute if you like:
Below are some links to products we recommend:
An excellent book if you're teaching mathematics or helping your children:
Educational maths help videos to learn mathematics for school, exams or just general life. New videos added weekly.
LIKE, COMMENT AND SUBSCRIBE TO OUR CHANNEL
Follow us:
#2Dshapes #geometry #sumofangles #shapes #learnmath #mathhelp #mathsteachingresources #GCSE
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