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.

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 ...

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.

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