Subject: Those d### strange dices?

I reguraly play Role-Playing-Games.
There are dices invloved
A D4 (a 4-sided dice)
A D6 (The "normal dice")
A D8 (a 8-sided dice)
A d12 (a 12 sided dice)
A d20 (a 20 sided dice)
Thes have all regular shapes (latin names tertaaeder, octaeader, etc.)

But we also have
D10 (a ten sided dice) and a D30 (a thirty sided dice).
These have a irregular shape (D10 looks like a D8 but has 10 sides(5 
up and 5 down) isstead of 8 (4 up and 4 down)

Is it true that the regular shped dices are more random than the 
irregular shaped dices. And why is that so?

Re: Those d### strange dices?