8 - Just Think of an octopus
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A pyramid will have as many triangular faces as the number of sides its base has, plus one in the shape of its base. This means an octagon based pyramid has nine faces (eight triangular ones plus the octagon base).
An octagon has 8 faces. In geometry, a face refers to a flat surface on a 3D shape. An octagon is an 8-sided polygon with 8 straight sides and 8 angles. Each side of the octagon forms a face, resulting in a total of 8 faces.
an octagon * * * * * An octagon has 8 sides. An object with 8 faces is an octahedron.
An octagon, (2D) has one face, zero edges, and eight sides.
An octagon has 8 sides with 8 vertices and one flat face