If a polygon has 8 sides, what is it called?

A polygon with 8 sides is defined as an octagon. The term "octagon" is derived from the Greek words "okto," meaning eight, and "gonia," meaning angle. Thus, octagons have 8 angles and, correspondingly, 8 sides. This classification is essential in geometry as it helps differentiate between polygons based on the number of sides they possess.

For instance, a pentagon has 5 sides, a hexagon has 6 sides, and a heptagon has 7 sides, which reflects the naming conventions based on these numerical characteristics. Each of these polygons serves different purposes in geometry and in real-world applications, highlighting the importance of accurate terminology in mathematical discussions. Understanding the correct terminology, such as recognizing an 8-sided polygon as an octagon, is crucial for clear communication and further study in geometry.