| Vertices: | 11 (9[4] + 2[9]) |
| Faces: | 18 (isosceles triangles) |
| Edges: | 27 (9 short + 18 long) |
| Symmetry: | 9-fold Prismatic (D9h) |
| Dihedral Angle: | acos(-root[199*(x^3)−243*(x^2)+69*x−1]) | ≈142.236557538 degrees |
| Dual Solid: | Simplest D9h (2 of 2) |
| (values below based on edge-scribed radius = 1) |
| Short Edge (9): | sqrt(root[(x^3)−132*(x^2)+432*x−192]) | ≈0.72794046853240472270 |
| Long Edge (18): | sqrt(root[3*(x^3)−144*(x^2)+1536*x−4096]) | ≈3.1114476537208246401 |
| [4]-Vertex Radius (9): | root[(x^3)+6*(x^2)−8] | ≈1.0641777724759121408 |
| [9]-Vertex Radius (2): | sqrt(root[3*(x^3)−36*(x^2)+96*x−64]) | ≈2.9238044001630872522 |
| Edge-scribed Radius: | 1 |
| Inscribed Radius: | sqrt(root[199*(x^3)−420*(x^2)+288*x−64]) | ≈0.946188648339465264651 |
| Volume: | root[(x^3)+36*(x^2)−1728] | ≈6.3850666348554728449 |