No, it is a prism as both of its bases are the same.
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you are really dumb. A sphere has not got a base. Therefore, it is neither a prism or pyramid.
A cylinder 3 faces compared to one and a sphere is fully round unlike a cylinder which has a flat bootom and top.
I'm quite sure this is impossible to prove, because the volume of a sphere is not equal to the volume of a cylinder with the same radius and height equal to the sphere's diameter. This can be shown as: Volume of sphere = (4*pi*r3) / 3. Volume of cylinder = pi*r2*h. Here, the height, h, of the cylinder = d = 2r. So, the volume of the cylinder = pi*r2*2r = 2*pi*r3, which obviously does not equal the volume of the sphere. The volume of half a sphere (with radius r) is equal to the volume of a cylinder(whose height is equal to its radius, r) minus the volume of a cone with the same height and radius. Therefore, the volume of a sphere is just double that. If you follow the nearby link, you can see a nice demonstration of that.
Sphere, cylinder and cone
A circular cross-section.
sphere, cylinder, cone