Polygons can be regular or irregular in shape. A polygon is a closed 2D shape with at least three sides. A regular polygon is a polygon with all equal sides and angles. An irregular polygon is a ...

It may be useful to refer to M1 properties of angles; M1 properties of 2D shapes and M5 Polygons if necessary. The sum of the angles inside any polygon can be found by spitting the polygon into ...

By doubling the number of sides of the hexagon to a 12-sided polygon, then a 24-sided polygon ... which were unknown in Archimedes' day—Archimedes used geometry instead. For example, he knew ...