Truncated Sphere D9
This is my own interpretation of the D9. Please check also clsn's version
This die is inspired by the repulsion force polyhedra
. In fact, the underlying polyhedron (not rounded) looks like the shape that can be obtained through this technique with 9 points repulsing each others.
But in this case, I calculated the positions of those points to have a maximal radius for the circles resulting from the intersection of this underlying polyhedron with a sphere. The result is a truncated sphere with 9 circular faces of same radius.
It is numbered from 1 to 9: 6 numbers are on vertices, 3 on edges, none on the faces. The sum of the numbers on the upper vertices is 15. Same thing for the sum of the 3 numbers on the lower vertices and the sum of the 3 numbers on the edges. This numbering is closely linked to the well known 3x3 magic square.
This die is made of a shell of 1.5mm that contains support material to make it heavier. The engraved numbers have a 0.75 mm depth. This new version has big numbers that should be easy to read.
More informations in this post
Available Truncated Sphere Dice: D4
Alternative shapes: alt D8
, 3-fold D10 (rounded)
, 3-fold D10 (pointed)
, 4-fold D10
, 5-folded D10 (pointed)
Coming soon: D22
Related dice: Concave D4
, Concave D6
, D4 Shell
, D8 Shell