Polygons

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GCSE Math (Polygons) Note on Polygons, created by Georgia Freeman on 02/02/2014.
Georgia Freeman
Note by Georgia Freeman, updated more than 1 year ago
Georgia Freeman
Created by Georgia Freeman about 11 years ago
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The sum of the interior angles in a regular polygon are always:

(n - 2) × 180° where n is the number of sides of the polygon

For example:

This quadrilateral has been divided into two triangles, so the interior angles add up to 2 × 180 = 360°.

The exterior angles of a polygon and its corresponding interior angle always add up to 180° (because they make a straight line).

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