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What you need to know
What you need to know:
The interior angles of a polygon (a 2D shape with straight sides) are the angles inside it. The exterior angles of a polygon are the angles formed if you extend each of the sides, for example the angle marked x below.
You should be able to derive (prove) and use the fact that the interior angles of a triangle add up to 180 \degree, including being able to determine what the interior angles of other 2-dimensional shapes add up to (by showing that they can be split up into triangles).
You are also required to understand why all the exterior angles of any polygon add up to 360 \degree, and moreover this means that the size of an exterior angle on a polygon is precisely 360 divided by the number of sides.
Interior and Exterior Angles Revision and Worksheets
You may be a GCSE Maths tutor in Harrogate on the look out for new GCSE Maths polygon resources or you could be a London Maths teacher searching for interior and exterior revision worksheets, either way, you should find this dedicated polygon and angles revision page useful. If you are also looking for other GCSE Maths revision resources then visit our GCSE Maths homepage.
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