GACE Paraprofessional Practice Exam

A nonagon is defined as a polygon that has nine sides. This classification comes from the Greek prefix "nona-" which means nine. Therefore, a nonagon not only has nine edges but also nine vertices where these edges meet. In the context of polygons, the number of sides directly determines its name; for instance, a triangle has three sides, a quadrilateral has four, and so forth. This systematic approach to naming polygons makes it clear that option D, which states that a nonagon is a polygon with 9 sides, accurately describes it.