| Vertices: | 14 (14[3]) |
| Faces: | 9 (7 squares + 2 regular 7/2 heptagrams) |
| Edges: | 21 |
| Symmetry: | 7-fold Prismatic (D7h) |
| Heptagram-Square Angle: | acos(0) | 90 degrees |
| Square-Square Angle: | acos(root[8*(x^3)−4*(x^2)−4*x+1])
= acos(cos(π/7)) | 180/7 degrees |
| Dual Solid: | Heptagrammic 7/2 Dipyramid |
| (values below based on edge length = 1) |
| Circumscribed Radius: | sqrt(root[448*(x^3)−1232*(x^2)+980*x−239])
= sqrt(tan(π/14)*tan(π/14)+2)/2 | ≈0.716256777210814081147 |
| Midscribed Radius: | sqrt(root[7*(x^3)−14*(x^2)+7*x−1])
= 1/(2*cos(π/14)) | ≈0.512858431636276949747 |
| Heptagram Center Radius: | 1/2 | 0.5 |
| Square Center Radius: | sqrt(root[448*(x^3)−560*(x^2)+84*x−1])
= tan(π/14)/2 | ≈0.11412173719507496904 |