What is the term for an 8-sided polygon?

An 8-sided polygon is referred to as an octagon. The term "octagon" comes from the Greek words "okto," meaning eight, and "gonia," meaning angle. Therefore, an octagon consists of eight angles and eight sides. This geometric term is commonly used in various contexts, such as architecture, design, and mathematics.

In contrast, a heptagon is a polygon with seven sides, a nonagon has nine sides, and a decagon has ten sides. These terms are also based on the number of sides and angles, but they are specific to their respective quantities and do not describe an 8-sided figure.