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A ten sided decagon has 10 vertices
A decagon has 10 vertices and 10 sides.It has ten cornersA decagon is a 10 sided polygon that has 10 vertices
A prism with an n-sided base will have 2n vertices, n + 2 faces, and 3n edges. 10 vertices
35 diagonals
A pyramid with an n-sided base will have n + 1 vertices, n + 1 faces, and 2n edges. 6 faces, 10 edges, 6 vertices