Slide 1 of 8, An image showing an equilateral triangle, a square and a regular pentagon., A regular polygon has sides (edges) that are all the same length and interior angles that are all equal.

Polygons come in all sorts of shapes: triangles, squares, hexagons, stars, and a host of other straight-edged forms. Segment lengths determine whether it’s possible to unfurl this eight-petal ...

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.