No. An example of a 3D object without vertices is a sphere.
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A sphere is not a 3dshape
cube
How about a sphere or a cylinder
Oh, dude, a 3D pentagon has five sides and five vertices. It's like a regular pentagon, but in 3D, so it's got some depth to it. Just imagine a 2D pentagon trying to be all fancy and three-dimensional.
6 because 3x2