Equilateral polygons are shapes with all sides of equal length. This means that no matter which side you measure, they will all be the same. Common examples of equilateral polygons include the equilateral triangle, where all three sides are equal, and the square, which has four equal sides. In addition to having equal sides, equilateral polygons can also have equal angles. For instance, in an equilateral triangle, all three angles measure 60 degrees. This property makes equilateral polygons symmetrical and aesthetically pleasing, often used in art and design.