Learn more about how angles in an 𝒏-sided polygon add to 180° × (𝒏 – 2) with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

David P. Robbins, a noted mathematician who tried in his dying months to solve a problem that had bothered him since he was a boy -- What is the area of a polygon if you know only the lengths of ...

Learn about and revise angles, lines and multi-sided shapes and their properties with this BBC Bitesize GCSE Maths Edexcel study guide.

The formula for calculating the size of an interior angle in a regular polygon is: the sum of interior angles \(\div\) number of sides. The sum of the exterior angles of a polygon is 360°.

Save guides, add subjects and pick up where you left off with your BBC account. Polygons can be regular or irregular. If the angles are all equal and all the sides are equal length it is a regular ...

For example, consider a regular polygon of "radius" r, where the radius is defined to be the distance from the center of the polygon to the midpoint of a side (this is technically called the apothem).

Learn about and revise angles, lines and multi-sided shapes and their properties with this BBC Bitesize GCSE Maths Eduqas study guide.