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There are many possibilities. A nonagonal pyramid A hexagonal prism A hexagonal dipyramid are three.
It has two bases, as is the case with all prisms.
16! * * * * * The answer is 18. No exclamation marks, just the correct answer.
* 27 edges: 9 on each end face and 9 other edges between the side faces. * 11 faces: two end faces and 9 side faces. * 18 vertices: 9 on each end face.
17 edges