12 edges
9
5
Oh, isn't that a happy little question! Let's think about it together. A prism has 2 bases and the same number of edges as the number of sides on those bases, plus the number of edges connecting the corresponding vertices on the bases. So, a prism can't have seven more edges than vertices because the number of edges is determined by the number of sides on the bases and the number of vertices.
It is three times the number of sides on a base of the prism.
Yes.
Yes because there are 12 edges in a prism and 12 is indeed a multiple of 3
all of its edges are straight
None. A prism can have only straight edges.
12 edges
no
3
9
12
They are straight lines.
There are twelve edges in a rectangular prism.
Because a rectangular prism has straight edges whereas a a cylinder has curved edges.