An octagon has 8 edges
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An octagon has 8 sides or edges
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An octagon has 8 faces and 8 edges. Each face of an octagon is a straight line segment, and each edge is a line segment where two faces meet. The total number of faces and edges in an octagon can be calculated by adding the number of faces and edges together, which equals 16.
The prefix "Oct" means 8 as in octet or octopus. An octagon is a polygon that has 8 sides