This document discusses a decagonal antiprism, which is a geometric shape with 10 sides. It is comprised of two parallel decagons connected by 10 triangular faces. The document contains 3 parts that provide information about and depictions of this shape, including a smaller version, and each part is copyrighted by G. Korthals Altes from their website.

1. Decagonal Antiprism
(Part 1)
Copyright © 2006 G. Korthals Altes
www.korthalsaltes.com

2. Decagonal Antiprism
(Part 2)
Copyright © 2006 G. Korthals Altes
www.korthalsaltes.com

3. Decagonal Antiprism
(small)
Copyright © 2006 G. Korthals Altes
www.korthalsaltes.com