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d9 - Nine-Sided Die 3d printed Printed in WSF.

Not a Photo

Printed in WSF.
d9 - Nine-Sided Die 3d printed Printed in WSF.
d9 - Nine-Sided Die 3d printed Printed in WSF.

Not a Photo

d9 - Nine-Sided Die 3d printed
d9 - Nine-Sided Die 3d printed

Not a Photo

d9 - Nine-Sided Die

Made by
3D printed in white nylon plastic with a matte finish and slight grainy feel.
Product Description

This die is made by finding nine maximally-separated points on the surface of a sphere, and then at each point slicing off a circular facet with a fixed solid angle. All the facets are the same size (in area and solid angle), so the energy to roll off of a facet should be exactly the same for all of them. But, because they are not distributed completely regularly over the surface (since they aren't vertices of a regular polyhedron), this die is probably *not* perfectly fair, from a geometric point of view. I suspect that the bias will be fairly small (I don't know if it's small enough to be comparable to or smaller than the biases introduced by imperfect manufacturing). Should run some tests and at least get some empirical results.

Be sure to check out another d9, designed a little differently, by Magic.

d9 dice die
What's in the box:
d9 - Nine-Sided Die
2 x 1.99 x 1.99 cm
Switch to inches
0.79 x 0.78 x 0.78 inches
Switch to cm
Success Rate:
First To try.
What's this?
Mature audiences only.
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