| Vertices: | 9 (7[4] + 2[7]) |
| Faces: | 14 (isosceles triangles) |
| Edges: | 21 (14 short + 7 long) |
| Symmetry: | 7-fold Prismatic (D7h) |
| Dihedral Angle: | acos(−root[239*(x^3)−227*(x^2)+45*x−1])
= acos(−(41−16*cos(π/7)+28/cos(π/7))/239) | ≈103.961168876 degrees |
| Dual Solid: | Heptagrammic 7/2 Prism |
| (values below based on unit-edge-length Heptagrammic 7/2 Prism) |
| Short Edge (14): | root[7*(x^3)+28*(x^2)−64]
= cot(π/7)*cot(π/7)−3 | ≈1.3119411104227270712 |
| Long Edge (7): | root[(x^3)+4*(x^2)−4*x−8]
= 4*cos(π/7)−2 | ≈1.6038754716096765049 |
| [7]-Vertex Radius (2): | root[7*(x^3)−28*(x^2)+28*x−8]
= 1/(2*sin(2*π/7)*sin(2*π/7)) | ≈0.81798190298779294908 |
| [4]-Vertex Radius (7): | sqrt(root[7*(x^3)−56*(x^2)+112*x−64])
= 1/cos(π/14) | ≈1.02571686327255389949 |
| Edge-scribed Radius: | sqrt(root[7*(x^3)−14*(x^2)+7*x−1])
= 1/(2*sin(2*π/7)) | ≈0.63952400384496630287 |
| Inscribed Radius: | sqrt(root[1673*(x^3)−2520*(x^2)+784*x−64])
= sqrt((472−464*cos(π/7)+334/cos(π/7))/1673) | ≈0.50381834168200655316 |