| Vertices: | 16 (16[4]) |
| Faces: | 18 (16 equilateral triangles + 2 regular octagrams) |
| Edges: | 32 |
| Symmetry: | 8-fold Antiprismatic (D8v) |
| Octagram-Triangle Angle: | acos(−sqrt(3*(7−4*sqrt(2)
−2*sqrt(2*(10−7*sqrt(2)))))/3) | ≈112.69174466499 degrees |
| Triangle-Triangle Angle: | acos(−(2*sqrt(2−sqrt(2))−1)/3) | ≈100.189899876 degrees |
| Dual Solid: | Octagrammic Trapezohedron |
| (values below based on edge length = 1) |
| Circumscribed Radius: | sqrt(2*(6−2*sqrt(2)+sqrt(2*(10−7*sqrt(2)))))/4 | ≈0.67267324947014347403 |
| Midscribed Radius: | sqrt(2*(4−2*sqrt(2)+sqrt(2*(10−7*sqrt(2)))))/4 | ≈0.44998811156820785232 |
| Octagram Center Radius: | sqrt(2*(2*sqrt(2)+sqrt(2*(10−7*sqrt(2)))−2))/4 | ≈0.39949478311896564986 |
| Triangle Center Radius: | sqrt(6*(10−6*sqrt(2)
+3*sqrt(2*(10−7*sqrt(2)))))/12 | ≈0.34518975538012211441 |