| Vertices: | 16 (14[3] + 2[7]) |
| Faces: | 14 (tri-equiangular darts) |
| Edges: | 28 (14 short + 14 long) |
| Symmetry: | 7-fold Prismatic (D7h) |
| Dihedral Angle: | acos(root[29*(x^3)−25*(x^2)+3*x+1])
= acos((4*cos(π/7)−4/cos(π/7)+13)/29) | ≈65.199782304 degrees |
| Dual Solid: | Heptagrammic Crossed Antiprism |
| (values below based on unit-edge-length Heptagrammic Crossed Antiprism) |
| Short Edge (14): | sqrt(root[49*(x^3)−49*(x^2)+7*x+1])
= sqrt((1+1/cos(π/7))/7) | ≈0.54901421581578408197 |
| Long Edge (14): | sqrt(root[(x^3)−(x^2)−2*x+1])
= sqrt(2*cos(π/7)) | ≈1.34236274374881182951 |
| [7]-Vertex Radius (2): | sqrt(root[3136*(x^3)−2352*(x^2)+224*x+1])
= sqrt((6−8*cos(π/7)+7/cos(π/7))/56) | ≈0.34230476463661118578 |
| [3]-Vertex Radius (14): | sqrt(root[448*(x^3)−336*(x^2)+27])
= sqrt(9−3*tan(π/14)*tan(π/14))/4 | ≈0.74345959663231443270 |
| Edge-scribed Radius: | sqrt(root[448*(x^3)−224*(x^2)+28*x−1])
= 1/(4*sin(2*π/7)) | ≈0.31976200192248315144 |
| Inscribed Radius: | sqrt(root[12992*(x^3)−3024*(x^2)+112*x−1])
= sqrt((90−74*sin(π/14)−11/sin(π/14))/812) | ≈0.17227791302733717566 |