A polygon with all sides of the same length is said to be equilateral.
In geometry, polygons are classified based on their sides and angles. An equilateral polygon specifically refers to any polygon whose sides have equal length. The most common example of an equilateral polygon is an equilateral triangle, where all three sides and all three angles are equal. However, this term can also apply to other polygons such as squares, where each of the four sides is the same length. Understanding this property helps in studying the various characteristics and classifications of shapes in geometry.