Oh, dude, a decagon has 10 sides, so it also has 10 vertices. As for faces, well, a decagon is a 2D shape, so it technically only has one face. But hey, who's counting, right?
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10 A decagon is a plane (2-d) figure and so it has only one face. It has 10 sides and 10 vertices.
A decagon has ten vertices.
10 faces 10 faces
A sphere has no faces, no edges, and no vertices.
3 faces ,2 vertices and 0 edge