none yes none
Two. One which is flat and the other which is curved.
A hemisphere is half of a sphere so it would have only one edge in the shape of a circle.
hemi
It has one
A semicircle.
A hemi-sphere
The root word for hemisphere is "hemi-", which means half.
Half a sphere has a prefix of "hemi" as in the Northern Hemishere.
No, it is half a circle.
Yes unless told otherwise
"Hemi-" is a combining form meaning "half". So a hemisphere is just a half of a sphere.