Subject: which shapes falls the slowest

I've already checked the archives and i haven't found anything useful so I was 
hoping that someone could answer this.

Say that a shape had to be only less than ten inches all around, which shape 
would fall the slowest (create the most drag)? 
would a sphere fall slower if it was bigger than a cube or would the cube's 
flat sides create more air resistance? 
Would a combination of the two shapes create the slowest fall? 

assume that the cube and the triangle are slightly lighter than the sphere 
because they are smaller than the sphere. 


Thanks!

Re: which shapes falls the slowest