I don't know why you'd want these. Maybe you want to put stickers on them. Maybe you're a hardcore geometry enthusiast. Maybe you're playing a really meta version of a tabletop game, and you're gonna roll these dice and then roll numbered dice to determine what number these ones landed on. You do you, buddy.
Others in this set:
D4
D6
D8
D10
D12
D12 (rhombic)
D20
Basic set