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9 sided "barrel dice" and 9 sided "parachute" style dice do exist. They are essentially cylinders with 9 numbered faces and rounded ends (so the die can't land end-on), or an ice-cream cone shape with 9 facets and one rounded end (again, so it can't land end-on). These are the only "fair" dice that can have 9 sides.

There is no "platonic solid" that has 9 equal sides.

Polyhedral Dice (The platonic solids you would generally encounter playing table-top rpgs like Dungeons and Dragons) generally only come in the following sizes: 4, 6, 8, 12, & 20. 10 sided dice are also available that are "fair", but are not platonic solids.

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13y ago

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