What is the shape and number of sides of a decagon?

A decagon is defined as a polygon that has ten sides and ten angles. The prefix "dec-" comes from the Greek word "deka," which means ten. Therefore, when identifying the characteristics of a decagon, one should clearly note that it consists of ten distinct edges and vertices. This classification distinguishes it from other polygons, such as pentagons (five sides), hexagons (six sides), and octagons (eight sides). Understanding the basic terminology and characteristics of polygons is essential for recognizing different shapes in geometry.