Let us study about polygon,A polygon is a flat closed figure made from straight sides. In order to be a polygon, a figure needs to have at least three sides, but it can have more than that. Here are some polygons:
- the triangle, with three sides
- the quadrilateral, with four sides
- the pentagon, with five sides
If the sides are different lengths, then the shape of a polygon will not always be the same. There are many different triangles, for example, that are very different-looking, because their three sides are different from triangle to triangle.
If however the sides of the polygon are all the same length, then the polygon is called regular.
A regular triangle has three equal sides. It is sometimes called an equilateral triangle. It could also be called equiangular, because its three angles are equal too.
A regular quadrilateral has four sides equal and four angles equal. It is also called a square.
But not all polygons are regular.
