There are 10 sides : 9 sides and the nonagonal base.
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A nonagonal prism has eleven faces.
Edges: 27 Faces: 11 Vertices: 18
Ah, a nonagonal pyramid is a beautiful shape! It has 9 vertices, one at the top where all the edges meet, and 8 at the base where the sides come together. Each vertex is like a little friend, all coming together to create a wonderful geometric masterpiece.
a triangle- based pyramid has 4 faces
a heptagonal pyramid has 8 faces