A decagon is defined as having how many sides?

A decagon is defined as a polygon that has ten sides. The prefix "deca-" originates from Greek, meaning ten. This classification is consistent with other polygon names that reflect the number of sides, such as "pentagon" for five sides and "hexagon" for six sides. Therefore, when identifying a decagon, one must recognize that it specifically refers to a shape that features ten distinct sides and corners, making the identification of its side count straightforward and clear.