Enneagonal antiprism

An enneagonal antiprism is a type of polyhedron that consists of two parallel enneagonal (9-sided) polygons connected by a band of triangles. In more specific terms, it is characterized by the following features: 1. **Base Polygons**: The top and bottom faces are both enneagons, meaning each has nine sides. 2. **Lateral Faces**: There are a series of triangular lateral faces that connect the corresponding vertices of the two enneagons.